What considerations led to the decision to make starting the timer after a player takes their turn a gameplay change that cannot be implemented unilaterally? It seems like a simple convenience, more of a practical feature than a gameplay one.
Added 5 minutes later
If you were to take the same army you used to capture a location manually, even if it were lizards, and there were, say, 20 of them, and if you could capture it quickly without losing any lizards, that would be a valid argument. But since you lost in the quick capture, it all looks like a trick that has nothing to do with the actual online game. Because if the trick doesn't work in the game, the ability to replay the quick capture won't save you; you'll still lose.
That's how it's captured without losses on the SoD quick capture (9 gr. lizards, 1 1 1 gnolls, 1 1 flies).