There’s zero point in making it a command. Either a universal one, or one that is character specific.
People have what seems to be a skewed vison on execution in fighters and the consensus is that less execution = a less skilled game competitively. Or rather, it’s a “dumbed down” version or “watered down”. That isn’t necessarily true. In fact, at times it takes away from the competitive nature of the game itself. I’m not suggesting to make every input as easy and mashable as possible, or to make every combo so easy a caveman could do it, not at all. But you don’t need complex inputs in order for a game to take a massive amount of skill and more importantly, to have a large skill gap.
I think the fear here is simple. If you make a game too simple executionally, the skill gap will be too small. I don’t believe that to be at all the case. The most important aspects of a fighting game, to me at least, are the high level competitive aspects. Which include but aren’t limited to, spacing, footsies, zoning, fundamentals, reactions, anticipation, mind games, etc. Knowing what to do in certain situations, when to punish, what to punish with, timing on jump ins, timing in general, knowing matchups, etc.
People believe that high execution weeds out the casuals and separates the pros from the noobs. Because in order to be able to have the ability to perform high execution stuff, you need to put a lot of time into being able to execute perfectly 99% of the time. And afterall, no casual is going to invest that amount of time into something as tedious as execution. But what if instead of that, instead of being required to spend a ridiculous amount of time in training mode for high executional stuff, you spent that time training in every other area I mentioned? The skill gap would still be there, it would just be ingrained in all the other areas that again, I already mentioned. I also believe it would be more encouraging for someone like a casual to put some real time into the game.
Anyway, I know your point was more specific to the fatal blows, but I just think in general high execution games, characters, combos or even moves are over glorified. I think there needs to be a medium level of execution, with some characters requiring more, and some requiring less. I could go on but you should get my point by now.