I myself am a Gallade user as of now, am not an expert so my opinions can totally be wrong but as far as I have noticed, there r 2 types of Gallade users:-
1. Scarf Gallade with Night Slash and Leaf Blade with SacredSword+PsychoCut
2. Life orb Gallade with Swords dance in place of either of the 2 coverage acc to team req
(3. I have tried using Razor claw on it sometimes and the 25% crit chance just destroys if the opponent doesn't have something like Skarm Or something to completely block us and even then 1 crit can destroy walls too)
And all the 3 types have obvious weaknesses
1 has the easily predicted swtiches
2 has the risk of being Outspeeded by something and getting destroyed in 1 physically damaging move
3 has the risk of not landing a crit(25%≠100%) or being outsped and killed.....
So
Just cuz of the 50% boost with sharpness
It can't be banned since it's coverage is great but it has too predictable movesets due to the greed of every move getting the sharpness boost 🤍