Pillager outposts need substantial changes

The latest experimental changes involving villagers are really welcome (at least in my opinion), but with the main focus of these changes being rebalancing the (admittedly) quite broken mechanics sorrounding librarians, i can't help but notice another very concerning "mechanic" that could render these changes, and any others planned in the future, completely pointless, i'm talking about pillager farms.

I'd argue that if the idea is to make villager trading more balanced, adressing the one source of infinite and easy emeralds is a necessity. The idea that comes to mind is to simply make them impossible to make, but of course, due to the nature of how the game works that would be quite hard, so i'd say that the logical solution is to make them far less efficient, and i believe i have an idea that not only makes these farms less overpowered, but also enhances gameplay involving these structures as a whole.

The main point is, make it so pillagers don't spawn infinitely in outposts. The player would attack the pillagers in the structure, and once he has killed enough of them a "mini raid" would start (basically a series of waves of pillagers would start attacking the player, just like village raids, but they would be far easier) the player would then be rewarded with bad omen V, but the catch would be that since you defeated the pillagers in that outpost, it would not spawn any more enemies for a substancial amount of in-game days.