We need to see what is their true intention, if they want to really do a hard fork and it's no longer a manipulation game play then you should avoid supporting any BU supporting pool seriously.
I think this is a limited point of view. BU is a fine proposal just like any other, and BU seems to be the least risk to me for the moment. Side chains will take value away from Bitcoin. While I also realize that I probably have a very unpopular opinion here, I think the Bitcoin Unlimited camp has been very clear with their intentions. So saying "what is their true intention" seems very FUD filled to me.
Bitcoin.com's pool is also paying very well right now.
As always, just my 2 cents.