I don't think its gonna be a stomp, you never know how bad SEN can choke (we are used to it now) so I think the score is probably be around 2-1 SEN or 2-1 TH (Yea, TH have a huge chance ngl)
I agree fully, it depends on TH shifting their map pool. If they stop perma banning ascent, their chances go up a lot. If they let SEN get rid of 2 of (Breeze/Ascent/Icebox) then they put themselves on the back foot before the match starts. If they cook up something on Ascent then I can see 2-1 either way