If Rogers came back to the Sharks, surely he should be considered for the fullback role? His time in Union has shown that he is great when acting as a support runner, he can trail off ball players anywhere on the field, his kick returns are excellent, and he can be a back up kicker in general play - similar to the way Lockyer played at fullback.
If anything, perhaps Peachey should be played at five eighth? Peachey likes to run across field and put players into gaps, so that role would suit him more.