I got an idea . I can understand why legendaries aren't introduced, but I got an idea that could balance them .
What-if, instead of not introducing legendaries, allowing us to get them, but only have one on the team .
Like, if you want Zapdos, go ahead but you won't be able to take another one on the team .
Or even more, allow us to keep only one legendary .
Not that I would use one, but I think that could be a pretty good thing .
Also, they could still be banned in competitions .