I'll add that we have the pieces to win, but need to reconfigure how they work together as their abilities change: that we need a few tweaks.
BBD's not getting any taller/longer, but is actually a decent post defender. Perhaps he will learn to play within his limitations.
Sheed is a good positional player, but doesn't have the hops/mobility to run around (not that he ever really did anyway). He would play better next to a young/mobile player who can compensate (BBD isn't it).
[FWIW, it really does look like Shelden and his longer arms/quicker feet might be a better fit next to Sheed]
Nate needs to learn what everyone can/can't do: running a play to get Tony Allen an open jumper is not a good idea...