Kinlaw Analysis from Mark Bullock, plus PFF Numbers.
See the link for Bullock's breakdown. The whole thing is paywalled, but there's a couple clips above the fold.
Turning to PFF, among Defensive Interior players with 300+ snaps Kinlaw ranked 29th in Pass Rush Grade. Newton and Allen were tied for 50th, and Payne was 57th out of 106 players.
Kinlaw's contract is 15 million AAV, which is substantially lower than Allen's was. It's also over 10 million AAV less than Milton Williams got from NE. We got younger, cheaper, and better at DT.