KMS ruined Elin Forest PQ...

No one nerfed it, because it's not a nerf. It's a graphical edit, not a change in stats for balance issues.

Also, it was most definitely workers at Nexon Korea who did the work. The franchised local versions don't do artwork for themselves. Whether it was cMS who commissioned the graphic work (or Nexon America, or even Nexon Korea acting of their own accord) is unknown, but frankly, I'm gonna guess that kMS did it, and it just happened that cMS and gMS were the first ones to get hit by the change. I wouldn't be surprised to see the same thing in kMS, slipped in nonchalantly, or perhaps even overwriting the Showa in other versions.

But that has nothing to do with this particular topic, because it's not a nerf and it has nothing to do with this PQ.

As far as the topic is concerned: I'm still hoping they someday remove ALL level caps on PQs and have multiple copies of the same map so that many parties can run at once.

The Boss PQ is instanced, there's at least 5 copies of the solo version and 5 copies of the party version. Maybe even more than that. I also believe that once you hit the rest point between each set of 5 bosses, someone else can catch up through the next 5 ( I stopped and went afk for a moment in between the first 5 and second 5, and saw a mage land inside and go on.)