The fact that all fighting games are locked 60 fps already implies that frame rate is highly important for this genre.
If the next Tekken or Street Fighter would be 30 fps on base PS4 and 60 fps on PS4 Pro, there would be a HUGE outcry. 30 fps players would be in a big disadvantage as these games have some single frame (1/60 sec) windows for specific setups. I would personally say that fighting games are the genre where frame rate matters the most. That's why they are all locked 60 fps (as that's always been the highest fps supported by consoles).
Of course, but the fact that a 30 FPS fighter is just plain horrible means it's highly unlikely to happen. And if it does people are going to be complaining about the 30 FPS version and not that there is a 60 FPS version available.
IE - huge outcry that they made a 30 FPS version in the first place. Not that there's a 60 FPS version.
So yes, it's certainly important (important enough that developers are reluctant to make a non-60 FPS fighter), but with the reality of fighting games on console where 60 FPS is the norm, controllers remain the main differentiator in whether you can be one of the top players. While having a high skill level will overcome that to some extent, it won't allow you to overcome someone with slightly less skill but using a stick compared to a pad.
So, I find it highly doubtful that a developer would make a 60 FPS fighter on PS4-P or Project Scorpio but then turn around and make the base PS4/XBO version 30 FPS. The reality is that they base PS4/XBO version would be 60 FPS and then an enhanced version released for more powerful systems.
The fact that developers continue to shaft console players by releasing 30 FPS shooters means that they feel that framerate is of relatively less importance for a shooter. And console players buy into that. Where a console player would rage if a 30 FPS fighter was released they are more than happy to play a 30 FPS shooter. While framerate isn't as critical for a shooter as it is for a fighter, it's still important. But similarly while the difference is less marked still significant for framerate in a shooter, differences in controllers are also less marked but still significant.
I think part of why 30 FPS is acceptable on console for a shooter is that they have such a horrible controller for shooters in the first place. It's not like on PC where a professional player is used to being able to do 360 degree turns in 1/60 (not relevant to actual play) of a second while still maintaining the ability to do any fraction of that in 1/60th of a second (very relevant to being competitive at the highest levels). Hence, the higher the framerate the more control a player has over view rotation and being able to quickly get the view exactly where they want it to be. Console controllers at their best will be relatively imprecise by comparison thus limiting many of the advantages that come with higher framerates.
That said, even at 30 FPS a keyboard and mouse would be far superior to console controller at 60 FPS competitively. Meaning that having superior controls does offer a much greater advantage over superior framerate. But since keyboard and mouse aren't really supported in shooters on consoles means that framerate has relatively more importance. But similarly better and more customizable console controllers also increase in relative importance.
Regards,
SB