Subsonic, shutting down Eng #2, then engaging prop brake then restarting is a total nonsense. The aircraft is designed to engage the prop brake with the engine running. That's the whole point of it. Not only are they increasing wear and tear on the battery and the igniters, and increasing the number of start cycles which also in turn increases their maintenance costs, they are massively increasing wear and tear on the Aux Hyd pump, which is only a small unit, and reducing its life considerably.
You should suggest that they operate the aircraft as ATR intended. If they don't understand any area of operation, perhaps they should speak to a design engineer @ TLS.
I've also heard a lot of nonsense in the past about working aft the exhaust with #2 in H mode. The noise is comparable to the APU of a 737, the engine is not large, and unless you stand right under the jetpipe, you'll have to try very hard to get burned by exhaust. Working by door #2R is not a problem.