First off, welcome to the forum NWO.
The answer to a lot of your questions/concerns is simply money. The Chiefs have little cap space this year, if any. So that leaves the draft, and the current rules for rookie contracts that make it a little more team-friendly to draft as opposed to blowing $$$'s on free agents. It does suck because it's roster management via the accounting department, but it is what it is.
Definitely agree with you about some players getting older, and some that are just overpayed vs. the performance we got from them last year (D. Bowe), but Dorsey is playing the hand he's been dealt. He's also just starting year two, and going by the results of last year (going from 2-14 to 11-5) have got a lot more faith in him than I did in Pioli. The sky isn't falling.