I think there's a lot in that, and Ill try to come back with each point in turn. There is a lot of overlap in our thoughts.
Firstly I think if the Super League was in any way a viable possibility it would have already happened by now. I've been hearing for 20 years how within 5 years there will be a super league. It's not impossible, but you cn see from these proposals United/Liverpool have no regard for the wider game so if it was viable, they'd be doing it. I think the existential threat is used to scare people to get more out of them. Thats the game here. It's like a domestically abusive spouse constantly telling their partner they could get better elsewhere and they have to do more etc. A common abusers trick. After years, indeed decades of threat, if they were going to walk, they'd have done so.
The reality is, there is a finite amount of money across European football. There is x amount of people who want to watch, y amount of money they are happy to spend. You may have potential growth of z. My strong suspicion is that x, y & z do not come to a number that would allow 16 teams to earn from a single league what they currently earn from their domestic leagues + Champions league football.
The value of the EPL (the big and only big success story) is well on the decline now, not only the rate of growth slowing (and now revenues per game actually dropping). The CL (the closest thing we have to a prototype European Super League) is also losing support, at an even quicker rate than the EPL. You throw on the recession we are heading into and there couldn't be a worse time to break away.
They also seem to be alienating ever bigger sections with this too. Increasingly it looks like tey may try to stream it themselves, so put themselves up against every major broadcaster who have rights to their own leagues. You've seen what's happened to the CL when they lost a single big Broadcaster (Sky) imagine going up against each one? It's a massive risk.
As for the final point, we essentially agree on this. What this does is continue to frame and strengthen the debate. I'm already seeing thick Kopites waffling on about "well something has to be done about games" and "The FA are incompetent" etc. It frames the debate and continues to put into their head the myth that rather than extorting money out of the league, that the league are somehow dependant upon them. So in that sense it works.
I have to be honest though, my gut feeling is this looks a big mistake from them. It seems a poor plan, put out very badly, with no razzamataz and losing any attempt at a culture. I suspect they are losing large chunks of other sides in the top 6's fanbase that would be winnable and indeed even some of their own fans. They have not succeeded in pitching this as a greedy land grab, and seeing their demands not as good for the game, but actually a greedy grab at power. Given Sky etc slavish devotion to them, it's a big mistake for them to lose tht support.
The SuperLeague could happen. Sometimes events overcome logic. Brexit is an example of this. I don't think half the people involved with Brexit ever wanted it to happen, but events and momentum overcame them. I think this will be voted down. If they had anything about them, they would resign from the league as a result as they bring in all the money apparently. They wont though. As they are disingenous and want to have their cake and eat it, shovelling off ever increasing and uneven sections of the pie, while still complaining it's unfair and they will leave unless they are pandered too.