See, I think fights with too many random mechanics are an awful idea because it's always absolutely maddening when RNGesus basically screws you out of a clear with a really unfortunate series of Bad Stuff™.
My opinion is that compared to what we have now, it'd be a nightmare. Getting 24 people in one place in one time is several orders of magnitude harder than getting 8 people in one place at one time. I don't see how anyone can try to argue otherwise. My static already runs into issues with scheduling. Note that I never said it would be impossible, just that it would be difficult; you telling me that I'm afraid of it honestly kind of makes me laugh. You haven't even touched endgame in this game, and yet you feel like you're in a position to pass judgement on it. All of your excuses about it are kind of meaningless - if you really wanted to experience it, you would've buckled down and done it. I first got into endgame long after T5 was a thing (Echo went into SCoB around the time I was in T8, so yes we had some catching up to do). I managed to get myself into a static and get myself caught up with T13.I don't think it is a nightmare. I think your actually more afraid of it more then anything else, however that is personal opinion. I know you don't agree with me, however its been proven to be implemented so I doubt its this "Nightmare" as you call it, since I have experienced it myself.
As far as 24 man raids go, I'm not willing to go down the road of pugging half of my raid on any given static night. I'd sooner play with people that I know have the skills to get through the content and that I know I can get along with well enough to raid with them. I think I deserve to raid with people that I mesh well with on a personal and a technical level. CT/ST/WoD are completely different animals - they're easy content that's meant to be clearable in all but the worst of random parties. Actual endgame content requires you to fine-tune that 8 man machine.