I do not think it was personnel moves, just like Superman already hinted at. Reid and president Mark Donovan got contract extensions. Dorsey's contract was to expire at the end of 2017, and even at the conclusion of 2016 season, Hunt was anticipating getting a long term extension done with Dorsey. Now he's gone and it would seem not Reid, not player moves got him fired, but potentially contract negotiation breakdowns.
They are going to get another GM, so it is not Andy trying to get full reign either. But they only have a few weeks before training camp, so they are under the gun to fill the position.
And while I do not beleive some of ther personnel moves were by Dorsey, some situations appear they could have been. Such as the Dwayne Bowe contract extension failure, the delayed re-signing of Justin Houston and Eric Berry costing more... Jeremy Maclin under performing his huge deal... plus the Chiefs always being tight on the salary cap (their cap specialist Trip MacCracken was let go a little while back), and while a good drafter, also had help from Ballard and others in doing it.
So there is some speculation that Dorsey feels he may get other opportunities soon, and asked for too much (in $$, years, or both) for Clark Hunt to buy in. I agree with Supe's it would be great to get him in here in an advisory position (Chris Ballard is still learning the GM position folks, and Dorsey to guide him in those other areas would be supremely beneficial to Ballard's rounding out), while Dorsey awaits his next opportunity, - which is rumored to be in Green Bay, where he owns a home, and maybe taking over for Ted Thompson should he decide to retire soon.
Bring him in Irsay!