The spring numbers don't bother me - I just don't know what he was supposed to work on. One hopes the strikeout-flyball approach he took last year is mothballed, because he has a track record of a very effective ground ball pitcher - I am fairly optimistic about him as a fringy #2, #3 sort.
Rodriguez has #1 stuff - sometimes there looked to be issues turning over the lineup on that third look. He definitely had that "one bad inning" issue also. Those are not the sort of things he can work on in the minors - because his stuff is good enough to conquer that without worrying about feel or adjusting.
Owens to me has kind of turned into an underrated prospect. He got swings and misses with big league bats - and that is much more to build on than most pitchers have. Now if I were dictator, I'd have him up here as a 100 IP kind of super-reliever where you can manage workload (twice a week, once through the lineup sort of thing), but more likely Pawtucket is the starting spot, and that's ok.