While not serious, I think it'd be a terrible idea. Dark Souls(and Demon Souls) are games where you're supposed to die. It's literally the only way to learn how to do things, they didn't design it so you can keep trying with infinite regen/low damage per hit type of things. Regardless of how good you are at the previous games, they're still largely games of knowledge and memory, where knowing the patterns, the locations and every little thing is more important than actually playing well. Plus obviously it's a terrible idea to retain your testers and test load/network shit.
Not a big problem to me though, I wouldn't play the game more than like 3mins, I'd wait until the full thing. Not that I'd get invited since I didn't register to anything, unless they do absolutely random invites but that would be weird.