You're right that the sim capacity is there but with deadheads, a room at JBU, and sheer volume, it might just make sense to throw a few landings on all your reservists with the existing fleet. I'll agree this looks like a lot of flying but they're mostly just a turn. So it may not be as much of an impact as it appears especially if the 190s currently flying are not being heavily utilized.

190 instructors weren't abundantly available when we were hiring, so retraining a whole fleet might not be entirely feasible. Also if they have to pull people in during off days, it adds up. Just a thought but may be completely wrong.