Leaf Blade became a TR this generation, but even after DLC, the only Pokémon that get it by TR who didn't get it by Level-Up before are Mew, Celebi and Lilligant; all Pokémon who don't need it and don't make use of it. In addition, all the Pokémon that could learn it before by Level-Up still get it by Level-Up with the sole exception of Gallade, so adding him on, that's a grand total of 4 Pokémon in the game that would actually ever use this TR, and of those the only one who would want to is a Pokémon that just got it by Level-Up before.
What?
What?