I think you misunderstood it. If you play a 2-countdown skirmisher, it comes into play with its current countdown at 1, but its base countdown would still be 2.
I do get it, It was unclear but I meant now, without quick. Scrolls enter the game with 2 countdown, but 0 countdown is considered the same as its full countdown therefore it goes from 0 to its full value at the end of your turn while counting down by 1 at your next turn. It would make more sense to me if they went to their actual countdown at the start of the next turn. A 2 attack skirmisher would go back to 2 countdown on the turn after it attacks, instead of going 0-2-1 over the course of half a turn.
If you made this happen & you reduced all their countdowns by 1 so they attack as often as before, then all creatures would no longer enter the game with what seems like a delay. It would be exactly like all creatures had quick, as they would all do their first attack sooner, but otherwise would attack as often as normal.
But there are problems with this. People will get confused because they aren't used to it & having 0 countdown might make people think the creatures will attack next turn but they wont.
Of course everything having quick would need a lot of re-balancing, but i think its a cool idea.