The game has a built in input buffer. You combine that with chains and the gameplay becomes much easier to handle in less than desirable online connections. The online system for the game is pretty good as well. I think CT was the best, but it's still good for Extend.
BlazBlue would probably be the gold standard if it used GGPO. I haven't played that much online lately, but the game tends to have an active playerbase online too thanks to all the lobby options. Japan is crazy about online play on BB though. I usually spot three to four JP only lobbies full of people(3-4 bar requirements on too).
GGPO wouldn't work as well for BB as the current netcode does. The current netcode deliberately does not use rollbacks as the input buffer takes care of a lot of minor latency issues that rollbacks are usually used to correct. As well, while this is subjective, I'm sure that many would agree that GGPO becomes unplayable at a lower ping than BB's netcode does, which is good because I would estimate that a significant percentage of the matches played fall around the 100-200ms area.
Desire to set controller down and watch when fighting Ragnas rising. Fricking pressure.
Ragna's overheads are shit. You can just block, punish or throw 6B (or just, like, walk away from it) and you can DP gauntlet hades. Check the frames on your AA; you may be able to do that too as Tsubaki's AA is bonkers. Given that, you should probably just block low a lot of the time. The most important thing to do is to watch what your particular Ragna player does after 5B; a lot of Ragnas won't even bother confirming 5B and do 5B 6B (this is a big gimmick of Lieutenant's), which means if you hold back after 5B you'll save yourself the trouble of having to take the ridiculous amount of damage that 5B goes into. Watch out for dumb grabs, too, as stagger (i don't know what the move is called, but people do it for meterless oki in the corner) into grab is very popular and also very weak. If you block a drive move, this is probably your chance to hit him. There are some circumstances in which he can DP and punish you for punishing him -- such as when your punish involves a dash or Ragna has 50 heat -- but most of the time you should be golden. Ragna's pressure isn't actually all that great. What makes it scary is that he only really has to land a couple of hits.
Because no one turns out for it. BB's online is so damn good there's no live action.
And it's a lot different from GG.
Nobody turns out for BB because there's this air around the community that makes them feel like they're not playing BB because they want to, but because they have to due to the apparent death of GG. So instead of playing BB or GG, they reluctantly and occasionally play BB, all the while bitching about how inferior it is to GG. It sucks to be around these people and it makes you not want to get better at the game due to the fact that these people who are bitching about the game so prolifically are also generally the best at it. If they don't want to play the game, why would I?