I own MBA and a Mac Mini, and I certainly don't feel crippled in the least. I'm looking at a MBP now for gaming, but I could actually care less whether it has an optical drive or not.
I am not even sure a MBP is the best choice for WoW full-time, but I can't stand the idea of going back to a PC laptop. I don't want a desktop, because I'm over hardcore gaming and like to play from my couch while watching TV with the family.
Either way, the idea that removing an optical drive is "crippling" seems absurd when a $40 USB drive "uncripples" it and most users do not use an optical drive 95% of the time I'd guess.
Now to decide whether I should wait for the redesign or not, I just don't know as I am not all that patient