This could lead to an increase in queue times just based on how many people were paused at any given time but it isn't a terrible idea as long as the timer idea is applied so that you can't pause yourself indefinitely or anything. There probably should be a restriction that doesn't allow Pause if you're queuing as a partial party though. Queuing solo, the pause timer would take care of you holding up the partially formed party as you would drop out after the 5 mins or whatever OR hitting pause could remove you from it until you're back. Might slow your personal queue time a bit though.