I just think, the game can become repetitive for a lot of people, one of the reason why i play very rarely now and prefer play some others games, online games take a LOT of times, when you finish a lot of solo games...for me, Online is more like 20% of my time (doom servers or others) and Single player is 80%....
Playing only online is fun yeah, but you miss some nice experience with the story gameplay of some others games, i mean, when i see some people who play only COD to become progamer, it's up to them, but i think, it's sad (specially when you know how a game like CS or COD can be 10x more repetitive than mm8bdm).
MM8BDM is a nice and fun game and need a lot of mods, even Unholy or others who looks wtf but if people like playing it and if it's NOT TOO MUCH broken, it's ok for me, i mean, because people complain too much when there is like "omg fireman do 14 damage instead 18, speed 1.1 instead of 1.2 you bad!", damn, if a game is correct, not perfect, let's enjoy it without salt.
Game are never really perfect anyway (but it's easy to critic for people...).
Even if JClasses is not perfect too, i liked to play a mod who were the most canon it can (with some bonus stuff because yeah, some robotmasters are basically too simple (metalman)), but some people liked to troll us in the servers for some minors things, it was boring... There was a guy who said "people, go on this other server, it's better" (yes, it happend like 1 year ago), i could ban him but it could be called "abuse ban" but not sure now when i see how it turns :/ anyway...
People need to be less sefish and enjoy the mods, personaly, i don't care at all if a guy play unholy or hotel, even if i dont like those mods' thing (well hotel is more a "map" with a relax-time game), but the fact some competitive people want only Duel, vanilla or some others mods because " THERE IS SKILL in this mod and in those ones, there ISNT", is very egoist/selfish.
I have fun with Jclasse (because canon style with some bonus), roboenza (i dont play it a lot but when i do, it's still a good moment of fun! Kill the zombies or be a zombie who must kill the others ^^) Saxtonhale (so a nice, epic and funny mods where you become a boss to be beat by all the others players

), Ydclass too (some class are fun too use, a good alternative who has still some originality even if i don't like some class like in the others mods, even jc right ?(i would want a bass who can run because it's hard to use him for me). Also, mods like CTF were really fun in the past, i liked it a lot, possession was hard to play lol but cool too.
I liked too YDclass+Saxtonhale, even if it was hated (specially because not authorized stuff yeah), it was funny to be one of your favorite robotmaster and attack boss like Remilia Scarlet or Scrooge McDuck, so epic and fun! xD
It's like DOOM community' purist, what about if doom was always with the software mod and no mouselook, no mods, still only 1 port with the same game, the same with only some new wads....it could not survive.....same for Megaman 8 Bit deathmatch.
Even if i don't play it anymore (or rarely), i still think, it's an awesome game with a big potential....but people need to be less angry when they debate about a balance issue...let's try to make the game better together.