I see no problem with placement, honestly the game gives you great variety in places to level. Basically pick a zone and go. Never have to be at the same place twice. That and the mobs around the camps tend to be at the respective levels.

I think people need to branch out some more and explore.

With enemy balance, the HP values on all Leve mobs needs to be increased and behest needs to be about 5-6 fold harder also the range attack on every mob needs to be removed.

Make the fights require strategy instead of button spamming. Maby make some leves where the extra mobs that spawns is a harder mob, like a mini boss which takes 4-5mins to kill.