I agree. There is no point in acquiring Asik if you trade Rondo. It is a different team, but still a mediocre one.
I believe the Celtics either need to go all in (i.e. trade picks and players to build around Rondo) or go full on rebuild (i.e. trade Rondo, Bass, Wallace, etc.). I just don't see the point in making trades that confuse either take and make Boston an Atlanta/Charlotte level team without much hope to get out of that tier. Just no point in that.
Yes, it's still a mediocre team. Hence the term "gap year."
Generally, I would agree with you that acquiring Asik if we're trading Rondo makes little sense -- if the team is giving up assets to get him.
As here, where the team is giving up nothing but expiring / non-guaranteed deals and the money it will take to pay Asik next season, I think it's fine. Asik can be a one year rental.
If Asik is not available for such a low cost, I would consider bringing in a stop-gap solution at center like Emeka Okafor, who is not likely to cost much, either, and could be brought in on a very team-friendly deal.
I just think there's a lot of value in bringing in a true center who can give the team quality minutes, because it will allow Sullinger and Olynyk to get more time at their true position, PF. It will also help the Celtics bring along any young center (e.g. Nurkic, Capela, or even Embiid) slowly, rather than throwing them into the fire before they are ready.
Further, it gives Brad Stevens the opportunity to show what he can do defensively when he has the basic, fundamental pieces for an NBA defense. I think it's important not to forget that we have a young, relatively inexperienced coach who needs to develop, too.
Giving him a team that will allow him to actually develop coherent strategies and implement a system moving forward will help him become a better coach. There's only so much Brad can really do if all season he's just shuffling around mismatched pieces.
I would agree with you that creating a "Atlanta / Charlotte" style team would not make sense if the team were locked into such a situation. However, again, this is a gap year plan. After next season, the team would be committed only to Meeks, Wallace, potentially Jeff Green, and a bunch of quality young players. They'd still have a lot of picks coming down the pike. In other words, the team would have all the flexibility in the world.