Now guys to be fair we should think about something too. I doubt ADHD often uses Villager. While he's a skilled player, someone who focused on Villager a LOT might be able to do this EVEN better.
Especially at Evo with a 5 minute timer, I'd totally pick up villager. More than likely, you could manage to beat out almost every avaerage player in pools with the strategy and at least have a shot at being in the big part of the tournament for bragging rights.
Is it actually going to be a problem in the long run? Can't tell unless you wait and see. Is everyone going to WANT to wait? Probably not from what we can see.
I don't think it will be that much of a problem later on (and I'm a big no one, I know). This strat doesn't seem like it has many other ways to evolve past what he already showed us, even if done by an experienced Villager main. It relies too much on the inexperience and impatience of the opponent.
He needs to have that trip sapling up near the ledge in order to keep the opponent away and capitalize on a trip if they get too impatient. Once people start learning the time it takes for the sapling to disappear they can wait it out in shield and then occupy that space preventing Villager from putting it back up.
He also relies a lot on the exploding balloons to keep people from punishing him and damaging the opponent before they can get their hitboxes out to punish his 2nd ledge grab. I could be wrong but it seems to me like the balloons fly up almost all the time to the same locations, if you learn where they go you could find a spot to stay and get that punish off without getting hit by the explosions.
Something else that seems very effective is ledge trumping and stage spiking. Villager's recovery is pretty predictable so an experienced player could very easily ledge trump villager seeing as he can't do much else but grab the ledge out of his up b. As for stage spiking, it won't kill Villager but it will tack on some damage which is really all you need, the exploding balloons might make that hard though.
All you really need to beat this strat is to get a lead on Villager and run away, forcing him to approach to revert the situation (which isn't exactly his strong suit), and by forcing him to approach you have already undone his gameplan.
Of course this is all theoretical and an actual Villager main could probably explain it better than I can, but that strat doesn't seem to be sustainable in the long run after people actually practice against it, and I don't really see where else it could go seeing as it depends too much on the exploding balloons and trip sapling to prevent punishes. Once people find their way around those there's not much else he can do.