New LEVELING IDEA
Okay, here is an idea, perhaps more classical RP-ish, dunno. Anyways, give it a read.
Disclaimer: This is not including or looking at the ability trees (for skills and such) as they are not yet implemented. So it will just look at stats.
At each level up, HP will increase at 20% of constitution, and Essence will increase at 10% of Intelligence. Also, you get 2 ability points to add to your attributes. An attribute point costs 1 ability point, so you can raise any single attribute by 2. (or two different ones by 1).
This will mean if your Constitution is 10, you get 2 HP per level, if its 15 you get 3 HP per level.
Same with Essence, you get 1 at INT 10, 1.5 at INT 15, or 2 essence at 20 intelligence.
Then, you can raise any attribute by one full point (twice).