I think they're probably close to done with the bullpen myself as far as prominent free agency. Find another cheap pick-up by either free agency (like Bellati) or trade (like Coonrod/Alvarado), guarantee some veteran $2 million or just go with minor league invites. The last time they tried the latter they got it wrong (Kintzler) but better to be wrong that way than the Familia way.
Even without Morales, Baker and McGarry you've already got:
Seranthony
Alvarado
Strahm
Brogdon
Bellatti
Nelson
Coonrod
And then Vasquez, Nittoli, Ortiz. Tayler Scott. As well as Falter (if Painter makes the team) and Sanchez (whom they probably should commit to converting).
Basicially you just need Coonrod to take a step towards coming back and one guy to come out of the rest of the group (two if you give up on Nelson). The names of the rest of the group may change, but the pedigree (waiver claims/youngsters) doesn't necessarily have to.