That's an excellent post, thank you for taking the time to reply.
Yeah it will lose in quality and get less money, obviously but I don't see it collapsing. The Government will jump in at some point if things really go south. It will also even the odds and actually make it exciting since the gap between the teams will be reduced, opening more opportunities for investors in the long term. The downside would be that the ESL teams getting richer and able to buy more players from the other not so lucky clubs. But then again if the FIA and the UEFA indeed manage to kick them out of every competition, where's the appeal for the players? They'd be reduced to play their same 38 odd games in a season, which can become boring fast, and then go home. Money can't compensate for everything. I can't think of many players willing to give a pass on playing for their country in the Euros, AFCON, Copa or the WC.
Like you said on a domestic level, kicking out the top 6 is doable and I don't see any of the 14 other teams objecting to that. On an international level less so, especially with the EU laws, but I suppose that the FIFA and UEFA won't back down either. They'll give instructions to the FAs to simply not call up the ESL players. Also who's going to be ref in ESL? The FIFA won't let any of their own officiate there.
I'm not fond of an even more watered down CL, or a WC in Qatar, and football needs a shake up but this is pure insanity. Unfairly and arbitrarily closing the shop at the highest level, writing their own rules for their own league, while still wanting to prey on the domestic competitions is a piss take that is never going to happen. I've read that some of the founders don't a rat's ass and even want their players to be banned from the international competitions. That gives weight to your assumption that these people neither are interested nor have a clue about football.
It ain't a FU to the UEFA or the FIFA or the oil clubs or whatever some fans like to sugar-coat it. It's been done to save the indebted big clubs in Italy and Spain and the owners of the english big six (Tottenham, lol) saw an opportunity to make even more money. Nothing more nothing less.