Nothing worrying about it, those characters are all extremely easy to play and have strengths that produce consistent results.
Besides, i think alot of "character loyalists" would do good to play other characters (especially top and popular picks) to get some insight on WHY people do that, what they have that their loyal character doesn't, and how you can use that info to advantage.
People flocking to good characters is how every competitive meta works. Expecting people to struggle with their original "mains" when they can swap to a better/easier character and get the same results with a fraction of the effort is just unrealistic.
Falco's buttons are certainly good but i don't know how much practical benefit you can get from this level of microspacing. I was going to main him but in general, while he certainly feels improved, the thing that
seems to lack in this game is any real identity. In Melee and Brawl,
was able to play a really oppressive style of approach and zoning and had a definite strategy for his kills -- grabs, tech chases, spikes. He became somewhat of a brawler in Smash4 but we all know how well that worked in that game without the top-tier tools....that and his laser was complete trash. But here in Smash Ultimate, he seems to be in some kind of weak limbo.
Falco just doesn't
have anything in this game, he has no real "niche". He's got combos but so does everyone else, he's strong in the air, but there are plenty of characters stronger...he's got a spike, but it's
nowhere close to the best, his air speed isn't the best, he's great at edgeguarding but so are like 70% of the characters in the game at this point. He's got a relatively weak and still quite immobile projectile so he's not really winning any shooting matches, even against characters like Mario....all things considered, his buttons are good but not nearly good enough to stand out, certainly not in this game......
Funnily enough i feel like
encompasses his original playstyle more than Falco himself, which is probably why people are flocking to him. Falco isn't bad, it's just that he doesn't really stand out in any significant way.