Well, here is my take on the trade so you can decide for yourself. Note: it was written before the trade was finalized and deals wiht its possibility as well. i was surprised they gave up on turk so easily. I know its long but if you are interested take a read.
It is clearly a move for the now disregarding the future, and it appears that the only reason for the move is the possible loss of hedo turkoglue.
In my opinion, the magic's systems all around shooting and balance is what gives it its potency. Lee is part of that balance, alston is a decent back up, and battie is a decent defensive peice.
The thing here is that vince has never been the aggresive stud he needs to be in this system, as one of the few players capable of penetrating and making open shots for others.
Carter doesn't go to the rim enough to really open up the shooters when howard is not scoring regularly or drawing doubles, and he has always been accused of being jumpshot happy, which is exactly the opposite of the magic needs.
THey need a replacement for hedo, a guy who can get his own shot, will be aggresive, get into the paint, and if he has to knock down the open j, but not to settle,.
As vince gets older he is more and more reluctant to attack and his efficiency gets worse and worse. The magic are a jump shooting team and they need a guy who can shoot 45% +.
Perhaps with a lower volume of shots, vince could be succesful, although his passing out after a penetration would have to improve. But i think having carter is a major downgrade. he is older, more injury prone, less efficient, has been known to be jumpshot happy and force offense and does not have the size and versatility offensively of turkoglue.
So, the trade appears like a gamble and maybe a possible disastert, but who knows, perhaps , they sign vince, with fewer shots to take he is more aggresive, gets into the paint with nelson, knocks down open shots, and opens up teamates.
It could workout being equivalent to turkoglue, the issue is will carter be healthy long enough for howard to finish developing.
An interesting trade with some potential and some issues, pretty balanced in terms of risk, it all depends on vinces attitude.
If vince gets a new hop in his step, penetrates aggresively, kicks out to open shooters, and finishes strong this could be his revival, but if he settles, which he has been accused of doing throughout his career, or gets injured, this hurts.
hope this helped