Single Engine Taxi on an RJ is pointless....the airplane is under powered to begin with.....so instead using 2 engines at low thrust to move a 53000 lbs airplane....lets double the fuel flow to one engine instead...its not worth it
from a MX standpoint it doesnt add up either....you dont have equal engine wear....especially when your not giving that second engine any time to warm up right before u take the runway....its does more damage in the long run than it does saving gas.
thanks for the support as well guys...glad im not the only one who felt offended