Tsubame-Gaeshi being described as "non-restrictive" is an odd opinion when its widely considered one of the worst designed skills in the game, and it massively constraints Samurai gameplay due to being so powerful that the optimal rotation for Samurai is a clearly unintended 60 second loop using Hagakure and filler combos solely so that Tsubame-Gaeshi won't drift or fall out of buff windows. It's a skill with such a deeply restrictive design it turns a priority order class into a looping one that needs extremely specific skill speed tiers and Hagakure abuse for its rotation to not drift.