Zakk should move to BKPs if only to lose the EMGs -- I've never really gotten into the active pickup sound.
I think Zakk has put some great sounds on disc now and then, but his live sound, at least in recent years, to me has sounded ... thin, perhaps, if that's possible? Too gainy or compressed? Something. Of course, it's better if you're standing 20 feet or so in front of the cab :) but on live recordings it sounds like the tone has been leeched right on out.
Anyway, I'm sure EMG pays handsomely, but the likes of BKP MMs or 'Pigs have got to sound more natural and organic, surely, even with all that outrageous output?