I've hit max level in Pagos last week and already have some thoughts on it compared to Anemos.
-Leveling is in a mediocre spot for players who struggle finding groups, particularly lower level players who missed the initial wave of players coming in.
-Gathering Light/Frosted Protean Crystals is in a really bad place because it deters max level players from spawning NM's. The reason for this is because NM's give terrible amounts of light and mutation monsters do not spawn NM's. The cold Lockboxes are another thing that helps take players away from spawning NM's.
-Louhi is spawned a lot less frequently than Pazuzu because he doesn't give enough light or crystals. Its more worth player's time to farm Light from mutation monsters. Louhi also takes too long to spawn. I've seen 3 nights with no spawn where people were actively trying to spawn him. This is a a big deterrent. Theres too many things saying "you're wasting your time spawning Louhi". Yes you need his orbs but most people will get their 3 kills and ignore him where Pazuzu was always worth doing no matter what your goal was. XP? yes. Crystals? yes. Feathers? yes. Louhi needs to be what Pazuzu was.
Changes I would make:
Make Louhi easier to spawn and increase his rewards to make him constantly desirable the way that Pazuzu was. Giving 2 frosted proteans might accomplish this. I would allow NM spawning monsters to mutate. I would increase the crystal/Light rewards from all NM's so that higher level players have a reason to spawn NM's for lower level players to help them level.
All of these changes together would probably create the NM trains all over again, so maybe we should only implement some of them or even changes I haven't thought about. But the problems we definitely need to fix are these:
-Help players struggling to find groups level
-Give max level players a reason to actively spawn Louhi and other NM's
-Make gathering frosted protean crystals easier or align better with other goals.