I know their CP. They're fairly strict on things. Kinda' like Chicken Taco was on having to know how to build the jet. Lots of pressure to cut costs at every turn. Fairly standardized, decent airplanes, and not a lot of politics that I can see.
A Legacy Shuttle is an EMB-135 for all intents and purposes.
Since they're using it as a shuttle and not an RJ I call it a Legacy Shuttle (I don't recall offhand if it is an actual Legacy Shuttle or just an EMB-135 like the two at KMMU are but it is hardly relevant as the job is the same).
I thought they had two. I have seen at least one of them in heavy check in Phoenix before...