yeah the que time would increase slightly.. but i don't think it would be as bad as people think.
we go back the the scenario of 1000 people and 200 people with support as secondary or primary
the people who put it was primary will ALWAYS get it
the people who put it as secondary will get it 40% of the time
and so we lose slightly less than 60% of our supports..
except we GAIN all the people who took support OFF as a role option. which I'm SURE must be at LEAST 25% of players if not more
and if are are already at the point where 60% or more of the players have taken support off as a role option when they don't mind supporting then que times would go DOWN. which probably isn't the case but is still a possibility.
i think the 75% would be too much and might negatively effect Que times too much, but 60% seems like a good number
granted the people who took off support as a role option would have to put it back on as an option.. which people might be hesitant to do. so i would probably predict longer que times for the first week or two but after that and people put support as an option the que times will go down.