Not sure if asked already, but in case of network split, which chain will this pool mine on?
There's no sign of a network split to decide about yet 
So far it's just scaremongering.
A real network split would require more than 50% of pools/miners to decide to change away from the current protocol, otherwise they're just making an altcoin ...
Exchanges already have contingency plans in place, have you already decided what to do?