I think Jarvis Jones needs a good camp to keep snap count to the level it was in 2015 .
Chickillo should be better with a year under his belt transitioning from End to OLB. I wish Tomlin gave Chickillo a few of Jones snaps as a pass rusher just to see what he could do, but it didn't happen.
DT Hargrove ( round three pick ) looks to be a valuable add to the 4 man rush. He's quick and plays with a low pad level. Hargrove could possibly be pushing Tuitt or Heyward to End in the four-man front, which could limit Jones opportunities as that's where he plays. It's all about getting the best players on the field.
That base 4 man rush would look like Heyward-Hargrove-Tuitt-Harrison. Each player in my book is a better pass rusher than Jarvis Jones, and I'm fully aware Hargrove hasn't played a down yet in the NFL.
Since Jones can't play kick coverage or in the nickel/dime as a linebacker, his value to the team is pretty low.