A universe that does not undergo a Big Crunch would necessarily last for an infinite amount of time.

False. I'll let you do your own research on other options.

2) I think a Copenhagen interpretation is more likely.

Objective collapse is a very unlikely case, it is contradicted by gravitational measurements.

3) I am not actually saying that all will re-appear is your brain, but the entirety of you and the rest of the world and so on, with exactly the same happenings going on. So yes, you would be conscious, and it would be you.

The question of consciousness and identity is way too deep to be dismissed with one argument.

5) [... ]

sounds like meaningless rambling to me

I am in no real position to argue with the author. So, in several years time when I've finished undergrad, gotten a PhD in Physics and am ready to answer you, I'll come calling.

Very smart of you. I hope that it works out for you the way you intend to. And that I will still remember enough Physics from my own PhD years to hold a useful discussion.