I have no idea if anyone has suggested this before, but I know of some people who are definitely opposed to it.
Anyway, I propose that pill/pend conversion become unlimited. I see 2 main effects stemming from this change:
1. no more suicide decks - only had 1 this war so far (and a handful of pseudo-cides), but it always causes a stir
2. more diverse vaults - teams will be able to field a much wider variety of decks, and even if they have an awful round (see water), they will have the opportunity to bounce back the following round. Also, this will make for more even competition in the later rounds.
Just a thought, but curious to see what others think about this.