If the opponent challenges it, then it will be reviewed, done properly, it can take a minimal amount of time (I'm sure somebody can just get the total frames from the un-extended cape to the ground, and then just count the frames).
In smash, it's always been a matter of whether or not the opponent challenges it, and when it comes right down to it, IDC got banned because of stalling (there are other ways that it could be broken, but this was the obvious one), so setting the standard as "noticeable". Deals with the issue without drawing any other messy distinctions.
Seeding is so the best player takes first, the second best takes second, etc.
Yes, you are expected to lose first match if you're new, but to obtain relevant results you need to at the very least, be able to beat the 50% mark (relevant, as in, in the money) which means that since you've got losers, even if you're seeded the worst and go against the best player, you still have a chance.
If you win, you improve your seeding.