Kidd improved as a shooter, I don't see that happening with Rondo. At least Kidd could shoot 35% at 3 throughout his career, while Rondo has no real 3 range to speak of. And Kidd wasn't a huge FT liability, shooting a respectable .785 for his career. Rondo still plays like he's afraid to get fouled.
Rondo's positives are legitimate, but his unique negatives make him a difficult player to build around. There's no urgency to trade him now as he's taking his time coming back and still has a year remaining on his deal, but I wouldn't make him untouchable.
The main point is, the future star of this team is not on the roster yet. For all his brilliance, teams with Kidd as the best player never seriously contended for a title (see also Nash, Steve) and he was the best PG of his generation.
If/when the Celtics are able to acquire the next franchise cornerstone then the question is does Rondo fit in with that player skillwise and agewise, not the other way around.
First of all Rondo had zero jumpshot when he first came in the league. Last year he (from memory) ranked top 10 in the league in FG% on midrange shots. I think that classifies as improving as a shooter.
Rondo also improved a little last year as a three point shooter. The eye test told me that he seemed to be taking more threes than ever, and he also seemed to be making them more often. Not enough to make him dangerous from three, but enough that he could actually punish teams for playing off him.
The statistics back up that theory. His 1.3 3PA per game was the highest number of his career and yet his 3PT% of 24% was the second highest of his career.
The only season in which he shot a higher percentage was 2008-2009, in which he shot 31% on threes...but took less than half the number of attempts.
The only season in which he averaged close to as many threes was 2009-2010, in which he averaged 1.0 3PA per game but shot only 21%.
For Rondo to push his 3PA up to 1.3 per game and still shoot around 24% was definately an improvement over previous years.
To put this in to perspective Dwyane Wade attempted 1.0 3PA per game last season, and he shot only 26%. That's 30% less attempts than Rondo, and yet only 2% more accurate.
Did his free throw shooting improve? Not dramatically, but a little. He shot 64.5% from the FT line, which was the best result since his rookie season (64.7%).
Now when you combine Rondo's much improved midrange shot (which was actually very good) with his much improved three point shot (which people now had to consider defending) with his career best FT percentage...I think it's safe to say that he did improve as a shooter.
Did these changes make him an elite scorer? Of course not. But as above Dwyane Wade's three point shooting was not that far above Rondo's last year. His FT% was also only 72% - only 7 percentage points better than Rondo. Yes 7% is a significant difference, and yes he takes a LOT more attempts than Rondo. Still, you are talking about a guy who has been one of the leagues elite scorers for the past 10 years despite having no three point ahot and rarely being more than 'decent' from the line. Rondo will never, ever be a scorer on a level anywhere near that of Wade, but the difference is that Wade's primary selling point is his scoring ability. Rondo's scoring ability is the least of his skills.
I do understand where you are coming from, but do I believe Rondo can he get by as an elite pass-first PG while shooting 50% from midrange, 24% from three and 65% fom the foul line? Yes, absolutely.
Last season Rondo played in 38 games. He scored 30+ points once, 20+ points 5 times, 15+ points 10 times. He did this as a fourth scoring option (behind Pierce, KG, Green) with pass-first intentions.
The guys is not an offensive liability. He's actually a very good shooter from midrange and an exceptionally good finisher around the basket(his shooting percentage at the rim is actually better than Derek Rose). He is a below average shooter from three and from the foul line, but he can still score from both places on occasion.
People make it out like Rondo is a horrendous offensive player - he is not. I have no trouble beleiving that he could average around 16+ PPG if called upon to handle a larger scoring load, in the past he's just never had to. If he were on the roster this season, I would hazard a guess that he (not Green) would probably be the Celtics leading scorer right now.
Kidd was never the leading scorer on the playoff teams he was a part of, but he still the best player on a Nets team that made it to the NBA Finals...so he was the best player on a championship contender despite not being a top scorer.
In fact I like this quote from Wikipedia:
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"The 2001-02 season saw Kidd lead the Nets to a surprising 52-30 finish, and marked one of his best all-around seasons as he finished second to the Spurs' Tim Duncan in MVP voting. Many have argued that Kidd deserved to win the award because of his impact in New Jersey—transforming the Nets from perennial league doormats into championship contenders seemingly in the space of a single training camp. His contribution to the Nets during his first season in New Jersey was huge, and resulted in one of the greatest turnarounds in NBA history."
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I'd like to note that Kidd led New Jersey to the finals before VC came along, and before Richard Jefferson developed into a major talent. The other starters on that team were Todd MacCullock, Kenyon Martin, Keith Van Horn and Kerry Kittles. This was the roster that Jason Kidd (a pass-first PG with limited scoring talent) led to an Eastern Conference title and an NBA Finals appearance.
Don't underestimate the impact a great leader can have on a team. If you think it's just Chris Paul's scoring that turned the Clippers from a joke into a borderline contender think again. It's his abliity as a leader and his ability to orchestrate an offense that led to that transformation.