Interesting theory, but what? The changes I mentioned mean less opportunities for trades and for collecting picks by renting out cap space, because teams aren't as desperate to unload players, and the ones that have been have had more options in who they deal with. Lack of activity seems to be a big part of what you and others are calling into question, and fewer opportunities means Utah may have to grab what talent they can when they can, even if it means overpaying somewhat for some players. Obviously not the ideal situation, but I really believe better options have been scarce for the most part.
I forgot to mention that the "win title within' first 7 ys theory" can be traced back to about 1991. Before there were players that won almost imediatelly.
And the number of teams with cap space is a direct result of shorter contracts as well.