Both Utley and Rollins are doing better in 2016 so far compared to 2015. Rollins has a higher average (268) and an OPS of 733. 1-3 in SB which is nt great. Defense is still down a bit so I think he may get a little worse the rest of the year.
Utley is doing great however which makes me think last year's dip was health related and SSS BABIP bad luck. Chase is hitting .314 (probably not sustainable) with an 826 OPS. He has no home runs so far, so it is possible that his OPS can stay in the 800 range even if his average drops to .280.
Keeping Chase to 400-450 at bats might extend his career a couple of years and get him a DH gig somewhere next year (he'll hate it). Another good 1,000 AB that could add 4-5 WAR to his career total (62.8 now) and get him some more serious HOF consideration. He'll never have the counting stats, but I am rooting for him.