Would it be feasible to add a Pause Queue feature?

[Tohe-Spidhire]

It's easy to say "if you're busy don't queue" but queues can take up to hours and anything can happen in the meantime, including a common pot break.

Sorry, if the PF takes hours, then that can't possibly be described as using it correctly. At best, the PF is a tool for assembling quick matches, with AT MOST waiting 15 minutes, otherwise you should be manually recruiting people to play at a scheduled time.