You're over-thinking things.Next year Hardy will care a lot about whether players are net positives or not. He will also care about each unit functioning at its highest level.
Ace in the starting lineup means JJJ is probably our 2nd best ballhandler and best POA/perimeter defender while Kessler would probably be our 2nd best passer. That is far from optimal. Put in Vince Williams or someone like him instead, and you elevate all those areas and the first unit functions much better in theory.
Also you have to try and put Ace in the best position to succeed (be as much of a net positive as possible). I think "bench Lauri" -role is the best option for that. It not only fits his skillset but it also means we can run a lot of our money plays even when Lauri is resting. They will end up sharing the court a lot as well since we obviously want to give Ace 25 mpg at the very least, but I see them subbing for each other more than not.
There is a path to the top of the league's hierarchy, and we aren't going to waltz over it in a single year. If you calculate the odds on reaching the top, then the most likely paths involve major contributions from Ace and the '26 pick. That will mean playing time in what you seem to think are "far from optimal" circumstances. There are, of course, other ways of thinking about and describing these circumstances. Playing with the teams most-talented players is closer to optimal than not—especially when you're on the wing, one way or another.
