Do you have to have everything chewed out for you?
The panties in Chad's gym bag were at the college before the MC arrived. Ergo, the MC is an extension of the plan. But there's no point in debating it with you because you don't want to understand it anyway. This is a review!
It's a good theory. Quinn and Tommy really wanted Sage and Chad to break up, but there are a few "buts":
1) It is unclear why the choice fell on Tremolo, who was on campus for a couple of days and was remembered only by the fact that he was beaten by Dawe. Of course, Sage will like the guy who is being bullied
![Face palm :FacePalm: :FacePalm:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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2) Quinn in the finale of episode 8, after the famous threesome between Quinn, Sage and MC, with some regret, asked if it was true that he fucked Sage from the very first day. That is, she didn't know about it for sure and only guessed. And guesswork for such a complex operation is a path to failure
3) The situation with Chad was generally beneficial to Quinn. It was because Sage had a crisis with Chad that she lost control of the situation and this allowed Quinn to seize power in the sisterhood.
In general, I agree with your theory that Quinn and Tommy wanted to destroy the tradition of HOTs&Jocks parties. They organized the blackmail of Chad, who was enraged, but MС came to hand, but in the end Chad was kicked out of the brotherhood.
MС was an unknown variable that made adjustments to their plans.
Do you remember Sage saying that MС annoys Quinn because she constantly ruins plans? At that moment, MC didn't really cross paths with her, but
1) For some reason he was beaten up by a Chad and he deserved respect (apparently Tommy should have gone for this role) 2) He intervened in the process of recruiting Maya to her restaurant
3) Apparently somehow Quinn found out about the rapprochement of MC and Sage and she didn't like it either.