Social poll.

Dirty, If he wants to, he'll install the new version of the mod, and then you'll play together with Quick. If he doesn't want to, he won't install it – that's his right, and then you'll have to play without Quick. In my opinion, that's the only reasonable and fair system.

But what if he wants to manually separate units and wants the opponent to do the same? What then?

Here's a direct question. If, after a million years, you create a truly bug-free Quick, would you agree that it won't give an advantage over those who don't have it?

Quick will always give an advantage, no matter what. In the example with Efreet and Archers. If a player has Quick, attacks the Archers, and the computer offers a victory, he can agree without risk. But the one who doesn't have this option might face a morale penalty and lose the Efreet. So, one player has the opportunity to immediately agree to a result that is achieved easily, while the other has to achieve that result. That's the whole difference. BUT, I repeat, this is nothing compared to saving real time.