This isn't the fix at all. The fix is, there should not be stuff happening between-turns (except for determining whose turn is next, which Outpost etc. can safely mess with). Why is there? Because of the interaction between Donate and Possession (it's not that you trash all their stuff, which doesn't matter since Possession gives it back; it's that you empty their hand). The correct thing there was to give up on that; that game is still awful, there was no fixing it. Then, Mountain Pass is between turns so Possession doesn't affect who makes the decision to take 40 debt. But I later fixed that on Possession itself.
Will I ever fix Donate and Mountain Pass to not be between turns? Man, maybe. I don't need to make that decision today.
With that fix you would still have the question of how many Coins and Actions you start other players' turns with. But yeah, I think you would avoid everything else, like all the stuff in this thread, and the question of whether you keep your Coins and Actions until the next player's turn.
But honestly, I'm even doubting whether I will include these rulings in my document, because they're so unlikely to ever matter. You need to have at least 5 cards included in the game, most of them specific cards and the rest from a very narrow category. For the questions in this thread, you need Donate, Way of the Mouse, Vassal/Black Market, one of the "play this" Reactions, the card in question (like Fortune), and often one more general card. Even for the question of Coins/Action on other players' turns you need at least Way of the Mouse, Black Market (or Storyteller+Vassal), Diadem, and one of the "play this" Reactions.