I expect to get my buffer back too. I will make a point to not use any in the next event and not clear any others in between. Then I will be back on an even keel.I expect that more and more people will have significant buffers of available provinces in the end game on a going forward basis.
My only point was a more general one about scouting times inevitably increasing forever, but the quests that ask for those provinces or relics are getting more and more numerous. I really hope that they're giving some serious thought to how the quest list can change. In one way they have done something right in making an event which doesn't rely on big shanty towns being built, doesn't create a demand for spoilers, and yet can occupy a bit more time than the quest lists of old - I just don't think it's being executed quite right still.