Perhaps more info on 2.0 than you wanted (big wall of text). This is about most of the problems I remember:
The biggest complaint I remember from the 2.0 launch was how the servers were constantly full due to the unexpected popularity. At one point they actually had to make it so there was only like a 5 minute window per hour that people could log in. Economies weren't that stable iirc either, at least on my server. There wasn't much gil in circulation and the base relic weapon for an earlier step cost around 50k for the DRG one and the materia for the relics were anywhere from 30k to 50k a piece. That might not seem that bad but iirc I probably had about 300k by the time I reached 50 with minimal purchases. Gear repairs also did not scale to the amount of durability missing on your gear. Also the difficulty of trying to complete Chimera for A Relic Reborn and just people having a hard time clearing Titan HM. It was also really difficult at first to get the Tomestones of Philosophy and to cap the Tomestones of Mythology. The fastest way was to sac pull AK and also Demon Wall used to be a huge pain in the butt before over-gearing and the removal of the adds. WP also used to be pretty difficult (though easier than AK) due to lack of gear and just people still figuring out the game. I do remember that there were some people who would leave after 1 wipe in content back then, but they weren't as common as they are now. There was also no PF so for things that weren't in the DF then (i.e. Chimera and Hydra) you had to just shout in the zone for a group. I remember too much about 2.0s launch.
TL;DR the biggest complaint was the difficulty with getting onto the servers and the constant D/C'ing. I haven't played Blade and Soul but I know that it's a few year old game that's been out in another country and it really should have issues like what you listed fixed by now.