Just like there's no need for an 11th Doctor or a 12th Doctor and this show to keep going after the one doctor finishes. Any show could just end. I just love this dismissiveness and we somehow know this isn't going to work before we've even seen anything.
Change is apparently bad. God forbid they actually create something new from something so precious. Starting from scratch is a great idea creatively and they won't be bogged down from what's happened before. Plus, if they for some reason, do **** it up, it won't effect the current show.
This has a lot of cool potential to reach new audiences.
It's simple. Want to reach new audiences without confusing the hell out of them, you start over. Yates is a good director and if he says he wants to spend a few years to get it right, he's not taking this lightly.