1) The conciliar pronouncements are not magisterial. There is only one magisterium;
2) “To the extent they are conciliar...”
3) Much appreciated. 
4) Only John Daly and the sedes believe that (naturally). Sounds like a bad rock band.
1) You said every pronouncement of the Church is Catholic insofar as it teaches Catholicism, and Conciliar insofar as it teaches novelty. So one has to go through each pronouncement clause by clause and use their private judgement to pick out what is Catholic(and therefore is part of the Magisterium) and what is Conciliar(and therefore is not). So it absolutely is Pick-Your-Own-Magisterium.
2) Not an answer. How can the hierarchy be in schism with itself? Something being in schism with itself is a blatant contradiction.
3) I'll humour you a moment and pretend you aren't playing dumb, and that you really have missed it. You said "universality is all that's required" for a pronouncement of the Church to be Catholic and not Conciliar. Then you(correctly) stated that universality is irrelevant to matters of discipline, and that for disciplines it's whether they're "contrary to the common good" or not that determines if they're Catholic or Conciliar. So, by that logic, every single law issued by the Church can be dismissed by a layman if he, in his private judgement, deems it "detrimental"--just as you did with fasting law.
4)
https://www.newadvent.org/cathen/09217a.htm Knock yourself out. When you're done with it, I can give you what multiple popes and saints have said about Pope Liberius. We can see if you declare the entire Church to be sede by the end.