After thinking about it a while, here's my list:
Jet Pilots Survival knife - Need I say more?
Scales for the 1117, or a slightly different handle?
BK15 no choil. I don't think it needs the choil. Also a stainless option with no coating would be lovely.
Bring back the BK17. I never got one when they were available and I'm not paying the 2nd hand inflated prices. By the way, Clip points are my Favorite!
At one point there was talk of a Tanto style BK11. The first sheaths were even shaped to accept the Tanto or the drop point. Have not seen the Tanto yet.