Violo
Resisting Pony Avatar
The point is that Megaman has the only projectile-based Smash attack and it does significantly more damage, along with the need to not be at close range.
Where do we see that his Front Smash attack deals 'significantly more' damage than others? The only time we see this attack deal auto-KOing amount of damage is in the trailer, where pretty much all of his moves do that sort of damage. The lack of UI also prevents us from knowing.
One more thing, you really shouldn't suggest a smash attack will destroy the meta of the game. Those are predictably easy to avoid unless it's inevitable as can be seen in that match between Megaman and Mario with Sakurai. It's not an instant smash, that would be horrible up close rather than at range.