What would be amazing is if the queue system would attempt to keep everyone together and just tried to find replacements for anyone that withdrew from the queue. If it is able to find replacements then those who already clicked "commence" should no longer be required to click it again. Only break up the whole group if there are no replacements available. You'd think that would cut down on a ton of issues. I mean, what's the biggest problem when someone else withdraws? The fact you have to click commence over and over and over again (still happens with ST, it happens less, but it still happens).
