They're bringing 17 pitchers coming and 14 position guys. The 26-man will have 13 pitchers and 13 hitters. Reese McGuire is almost certainly the backup catcher on the 5-man taxi squad, plus 4 pitchers TBD. Shaw then is for sure on the 26-man and likely Thompson DFA'd as you say.
Taxi squad pitchers might be Palencia and 3 out of Wicks, Brown, Miller, Pearson, Morgan, Keller. I think Wicks probably starts in AAA barring injuries and Morgan is on the team.