Let's talk about Shaw, Ballesteros and Alcantara.....
1) Alcantara has no options remaining. Sending him down exposes him to waivers. Not happening. He's also the only current good defensive CF replacement if PCA were to miss time. Shaw might be okay there, but again, Alcantara can't be sent down. He's your 4th outfielder. Period.
2) Shaw is clearly the current utility de jour. He has the ability to play all over the field, and he might be the best utility infielder in MLB this year.
3) Ballesteros is the only current lefty bat of all possible bench/DH options. Could you sign a Tauchman or the like to allow Ballesteros to sit in AAA? Sure. Can they find a better bat than Ballesteros to be the lefty side of DH? Probably not.
The question for me is, is there a future for Ballesteros behind the plate? If not, he's your DH platoon from the left side. He's also your first PH bat against RHP off the bench. So he's actually penciled in as a starter on my roster.
4) Tyler Austin is likely the 4th bench player, after winning the battle with Jonathan Long in ST. Likely winning it simply because Long has options and Austin was signed to be here.
Barring bringing someone else in, I think the offensive roster is set with Jaguar, Shaw, MoBaller and Tyler Austin.