bringing in Jingg in a match where he's probably not even going to play during the REG season is insanity, showing they're here to win and not experiment like SEN is with TenZ on Omen horrible look honestly.
most of the stuff prx do aren't set plays, well not in the traditional sense, yea they might run certain things over and over again like a certain push, but its all down to their mastery in teamfights rather than any sort of strategical advantage or perfect igl reads. Idk if you understand why PRX are as strong as they are, its not due to strats or anything, they do have them but its only a guide rather than a plan, combined with great midrounding and finding gaps is what makes them so strong and that isnt map dependant. Its why they can run comps that arent meta at all like omen astra cypher on lotus and still look insanely strong
the mid rounding is a direct result of the early aggressive set plays (set plays can be aggressive), without the early aggression the mid round looks completely different. Aggro set plays create so much chaos that it makes opponents struggle to adapt in the mid round and leave the gaps you are talking about. The odd comps usually enable or take advantage of the set plays (why they run so much breach, reyna, yoru, and even cgrs' gekko) The double smoke comp allows forsaken to help from across the map while poking for gaps elsewhere and the cypher variation allows them to cheese some picks and delay the opponents while they try to find the trips so the rest of the team can just flood as fast as they can.