Do you have to use the bddi?
I always use 500k audio from guitar fetish, unless I scavenge them off stuff. They taper well, give more brightness and do everything a 250k does, just a little more as well. Even my old esquire was 500k pots, though usually I switch to bypass the tone knob. My mudbucker is currently wired straight to jack and seems to have more going on in the highs, but I didn't go for a giant overwound humbucker right at the neck for an even tone either.
Series vs parallel, I assume that's the coils in the mudbucker, I'd def make that switchable if I was determined to drop it from the original series.