Whatever a team does produces tradeoffs. The best path is to lean into the set of compromises that maximize your two or three best players, and that's what we've done.
The core strength of the team is its defense, and that is largely based on almost no one playing who isn't a switchable plus defender who works in the scheme. I think it is crazy to give that up.
Smart is the starting point, but this team runs its offense through Tatum. Tatum expects that this is his team and this is his role going forward. Taking that away is super risky. Whether we keep Smart or somehow miraculously trade him for Dejounte Murray, this is still more on Tatum to fix as long as he's the man on this team.
The answer is not likely a new #1 point. It has to be a series of smaller improvements by everyone, and mostly improvement by Tatum himself, which is highly likely.
I don't think they are far away at all. If Derrick White could have just been pretty good instead of alternating between excellent and horrible, we might have avoided a few rough patches and won it all. If we had an older vet looking for a ring instead of Pritchard, we might have won a quarter or two we otherwise lost. Those are the places we should be looking at, not some huge shakeup.