We hardly ever press guren or shoha 2. There's ZERO reason for them to be their own button. I generally don't like the whole button bloat argument, but I also don't like redundant skills either. Shoha and Senei could easily act like the myriad of other aoe skills in the game where the first target gets the normal potency and then the remaining targets get a reduced potency hit.
Please don't tell me you Single Target Combo on Big Dungeon Pulls.

And your macro comment doesn't really change the argument that if they wanted to deal with bloat they could have combined ishikoten and ogi without taking away kaiten. Reality is they removed kaiten because of scaling reasons as they are clearly going to be making significant changes to stats and what not in 7.0. Sadly they chose samurai as an early experiment for 7.0 changes they are working on.
though they wanted to address the button bloat and took Kaiten away. My Macro addresses the Button Bloat by making you pressing the same button 3times, try my Macro before saying it doesn't matter^^ but funnily I also have Shoha and Senei on a one button Macro xDD I tell you, we get a Single Target Ogi with 7.0 and there is nothing wrong about this

You don’t need single target and AOE variants of these abilities. Especially when Guren already did it right in SB: it was your second strongest ability, and could be used in both a single target scenario and an AOE scenario. Senei is redundant and needless bloat when Guren already did the same thing prior. And this single-target with AOE falloff isn’t a new concept. It’s still a thing on other jobs now.
Okay Senei is redundant for providing the solution to the single target situation while using the same resource as Guren? Great that AoE falloff stuff is a thing on other jobs, then play those other jobs, I like to play Samurai and the removal of Kaiten is what keeps me from enjoying Samurai

Do not recommend combat macros without also addressing the issues they present within combat. Macros do not queue in this game, and you risk losing more damage in your attempt to consolidate, and from macro misfires. They are not and have never been recommended for general combat uses outside of a handful of oGCD utilities. Never for combo consolidation like what you are suggesting.
Do expect me to write an disclaimer on how and when to use macros? that macro wasn't an order, just a suggestion for something we already can do ourselves or do you want to beg the devs for years until they do? funnily enough a Dragoon change of 6.1 is that jump turns into illusion jump, which I had as a macro for years.