Yes definitely. I remember the fc / fc2 transiotion, within few weeks noone flew FC in MP...so I guess in order to enjoy MP you'll be kinda foreced to buy it. I see no other reasons not to buy FC2...
I've got all ED products (LOMAC, FC1, FC2, BS, WH, BS2) although I don't get too many sticktimes with BS, BS2 and WH. But they're there just for the sake of it and I can fidle with it anytime I want!