2500 fpm is ideal in this jet imo. The arrivals seem to like 1500 fpm it seems. But saying 2500 fpm is unsafe is a bit... extreme? Just my opinion. There's literally a million ways to do the arrivals with the 140. I set up my way on my side no matter who's flying. If the other guy is flying and is doing something that makes me think he'll bust a limitation, I say something. Otherwise, it's his ship.