Great Teacher Nekojin
You are missing the point. Snorlax is going to be faster than everything in the end. And as long as their starter does not know Whirlwind, I can pull it off. No one is getting the fact that almost everything in the end will be OHKOed by Snorlax. That is the point
Another point though is, as Tentae stated, priority moves and focus sashes are going to end you when used properly (and they are very frequently used).
It just sounds like you're getting a bit defensive. If you put something up for critique, you're inviting criticism. We're just here to offer advice because you asked for it, not to beat your ideas down. Honestly, I think your idea is pretty clever; there are just a few things you need to keep an eye out for that will trip you up.
For example, you can do all that setup, but my Infernape with Focus Sash will 2HKO Snorlax with Vaccuum Wave even if you pull off all of those passes.
EDIT:
I just noticed another issue you might encounter. It's rare, but it will happen if you battle with this team enough. When Smeargle uses Trick, be sure to keep an eye out for the defending pokemon using Choice Band or Choice Scarf. That would stop you from being able to use other moves, thus losing the passing benefits and you'd have to start over from square one.