Not seen all the games, but what I did see I wasn't that impressed with Scheierman so far. I think there's precisely zero chance he cracks the rotation based on his current level of competence. Obviously it's just summer league and everyone else is trying to impress, but I think he himself was trying a little too hard. I think some time in the G-league will do him good.
The guy I've been most impressed with, other than Queta and Peterson who has been in the program for a year already, is that kid Anton Watson. I think he's definitely showing some promise.