the improvement (while dramatic from a talent point of view) is based on rookie hopes not proven vets
It's funny to me that you are so negative that you are almost forcing me to defend a team that I don't really wanna defend.
You said that all we're depending on is rookies and unproven talent... Our biggest acquisition in my opinion is Kyle Lowry. Not only is he very understated but he is no rookie. He's already played 6 seasons in the league, he's a vet. I don't know if you've seen too much of him but IMO he's a game changer. He's not the passer that Calderon is but he's one of the new age guards that can rebound, defend, penetrate, etc... He will have to work on his efficiency, but i'd say he's a definite upgrade on Jose Calderon.
Worst case scenario if Val comes in with a huge learning curve, and has issues with foul trouble, even just having him on the team and playing 20-25 mins/game would be a HUGE upgrade on Aaron Gray. We have a real Center now so we don't have to play two PF's in the starting lineup (Bargs/Amir and Bargs/Davis). Only other significant rookie on the roster right now is Terrance Ross. And while he stands a chance at being a solid piece on this team, he's not someone we're depending on to carry us or anything crazy like that. And it can only help with him coming off the bench with a starting quality pass first point like Jose Calderon.
As I think Funk said, Lowry, Calderon, Derozan, Bargs, Gray, Amir, etc... the majority of our roster are vets. So we kept all the core pieces, plus added a couple of starting caliber vets (Lowry, Fields) and potentially starting caliber rookies (Val, Ross)
With all that said, i'm surprised you still came out and put us at 10th given that you had given a long list of teams that you thought were better than us with the exception of Cleveland and Charlotte.