Guild recruitment currently wouldn't be hard at all if you didn't make it hard on purpose. And it wouldn't take longer than an hour to run new recruits through normal TES anyway. Do something for your recruits, don't just expect them to do everything for you.
How about... no.
Nobody wants to raid old content every time they have recruits who need to be attuned. An hour spent getting people attuned is an hour people aren't doing progression.
Stating an opinion as fact does not make it fact. Opinions are not fact. So don't be stupid and make a fool of yourself by trying to pass off your opinion as fact.
I honestly wouldn't like the idea of having to clear the previous tier's end boss. I remember they used to do that, and I hated every bit of it. However, since 5.0 raids will be cross-server, to be honest I don't think it would be that bad if they did do that. Not that they are.