See, it's always been my opinion that you want the stiffer hipped guy at free safety, rather than strong. Strong safeties play a lot more in man coverage and in the box, where you have to be able to change directions quickly and fluidly. That's not Jones' game. His change of direction numbers at the combine were positively offensive linemen like. But he can plant and run in a straight line pretty well, and physically that's the job of a free safety much more than a strong safety.
I think he plays better looking at the quarterback. He's instinctive and a ball hawk (Chris Clemons is neither, but speed cures a lot of ills). Jones has limited range but that's just how it goes. Ed Reed is a stiff hipped athlete and if I recall only ran in the mid 4.5s. Which is not to say Reshad Jones is ever going to sniff Ed Reed's jockstrap but I just don't see him as a SS. He didn't play particularly well there his junior year and so far the Dolphins have made no effort to move him over, which I applaud.
I think Jones and Clemons will have a legitimate battle for the starting FS job this year. It honestly wouldn't shock me to see Jones win that battle, though I think the odds favor Clemons. When it comes time to replace Bell, in my view they'll look elsewhere.