+R, Xrd, BBCF imo
It fell out of favor of the general public because it has no casual appeal. And even if a game is theoretically designed purely to be a competitive sport, it still needs casual appeal because the casual audience is who generates revenue, watches tournaments, attracts sponsors, creates content, creates buzz and news and hype etc.
The last few years it seems like the idea was to simplify games to help attract casuals, it was proven time and time again that this does not work for a multitude of reasons. FG devs need to look at what other popular competitive games do and copy that.
I think the best philosophy is to offer modes of play that are explicitly designed for casuals. Look at SC2, intensely difficult competitive game, but had a super fun campaign, custom maps and minigames and a good story which still let casual players engage with the game and have fun. Same thing with CSGO, it has tons of mods, surf maps, KZ maps, bunnyhopping, zombie escape and rp (idk if those two are still a thing in GO). Even LoL and DotA have stuff like ARAM.
FGs need something similar. Let the competitive & ranked side of the game stay difficult but offer other things for casuals to do that are actually fun. Beating up poorly programmed AI with 5 sec slideshow cutscenes of story in between is not fun and that's the only casual content FGs have had. It's one of the main reasons i'm optimistic about SF6, it seems like the first FG to try this idea seriously.
Anyways I hope to see some of you guys in SF6 when it comes out.