Patch 6.4 dropped not so long ago and still kaitenless
Although i started playing quite recently, just the last august, my main goal was to get samurai asap and i quite did. Thus being stated it becomes clear that im unfamiliar with kaiten gameplay and havent been aware of its once presence until this march when i found out that it was actually a thing and the thing was big. That made me wonder why its been removed and after record-short terms of searching i figured out that its far from me being the only one who was wondering. Long story short i've recently read this and another one thread over the last day and man do RyuuZero loves drg and therefore most of skill merge counterarguments was about "it would be the same as those 2 skills that we already have on another job". Some might agree some might disagree but as i read further i came to a simple yet quite effective solution on button bloat which also would solve the same mumbling about accessibility issues.
So. Lets look truth in the eye. If ones would really be concerned about reducing button bloat and keeping variability at the same time (ST/aoe (especially for sam as its the main topic here)) we would get a "One Button To Rule Them All".
BEHOLD! THE STANCE SKILL! Specifically oGCD ST/AoE stance swapper with nearly no cooldown (something close to thm element changer). This little guy should appear as soon as you get ur first aoe weaponskill (which then would be considered as a trait for specific weaponskill). And as it comes from said above this button simply changes your ST skills to their AoE counterparts which are now also "*cannot be assigned to a hotbar".
With this solution we actually merge skills but instead of losing variability "because now everything is aoe wtf" we now have one or another for a single button that does about the same thing but mostly with different potency, therefore one button = 2 weaponskills which empties like a dozen of buttons (actually only 6 if im correct about it) leaving some place to put this stance skill, bring back KAITEN and drop any other new things they will want to throw into us (that are not like lets say ST ogi since its gonna be swapping with current namikiri back and forth). And GCD oGCD wont be a problem since nearly all of them share their cooldowns with their counterparts.