Rondo trade ideas pop up because he can net us something of great value. I would trade Rondo for Drummond, for example. I think a sully drummond (and hopefully Wiggins/Parker) front court would be amazing.
I wouldn't, and don't.
I think Drummond is still overrated right now. His potential might be high, but his current production on a per minute basis is really not standout.
He's good sure, but people talk about him as if he's a potential massiah and future best center in the NBA. Anthony Davis and Demarcus Cousins are both FAR better than Drummond is right now. Dwight Howard (despite dropping off after injury) is still way better than Drummond. Monroe is (IMHO) better than Drummond.
If you trade Rondo for Drummond then you are trading a current elite player for a guy that you hope one day becomes an elite player...but may well not. Wouldn't surprise me if he just ends up taking an Emeka Okafor / Nene path (i.e. becomes a very solid player, but not a star).
If you traded Rondo now for Okafor / Nene when they were in their second years and showed all that promise, then fast forwarded to now...you'd ve wishing you could take that back.
I honestly wouldn't trade Rondo for a center unless that center is just as dominant as his position as Rondo is at his - Anthony Davis, Dwight Howard, Demarcus Cousins, etc. Even the Dwight Howard option is one I might turn down because he is no younger young and full of potential, and his attitude (even at his age) is still terrible.
I honestly don't think Drummond is worth giving up Rondo for. I don't think he'll ever be better at center than Rondo is at PG - as good at best, and even that is probably unlikely.
As stated by the OP, I just watched the 76ers game today and Rondo was absolutely dissecting the defense. He was pulling off some amazing dishes, and at least 1/3 of those passes were ones that only 2 or 3 other PG's in the league could probably pull off. There were so many passes through traffic that went straight to a cutting player (leading to an easy layup). There were so many drive-and-dish plays where Rondo drew 2 or 3 defenders while driving and then kicked it out for open threes or jumpers. He really does completely change the nature of the game when he is out there and playing like that...and that's only talking about his passing. On defense he was huge - a number of big steals and deflections as well as multiple charges taken - he was all over the place.
Very few guys in the league who can impact a game in ways other than scoring, the way he did against Philly. Get this guy a supporting cast of guys who can actually make shots consistently, and opposing teams would be in a lot of trouble.