Well, he (Kennedy) makes a huge number of decoy and supporting runs. Seriously... I went trawling through the numbers (when Mix first posted about him, was the only ex-Raiders prop at the Cutters) - the closest prop in either reserve grade comp for decoy & support runs per 80 mins was about 60% of Kennedy.
Outside of that remarkable characteristic, he seems fine. Has played a lot of very low-minute stints which flags up as a concern, but his workrate doesn't drop when you isolate his bigger minute performances. A big, brutal go-forward guy he probably isn't, though - he's a worker.