There is a good way to balance this leveling system in my opinion.
Current level system is too narrow. lots of players are in the same (top) level. Because of level range between 0 ~ 36 skill point distributions are usually same.
In my opinion, to give players more freedom about builds, maximum level should be set up to 80 and for the maximum level 80, player have to gain like 1.000.000.000(reachable) experience and necessary experience points between levels should not be too much.
Also with this new level range, whole item restriction system have to be set up again for all items. There should be priceless new armours and weapons for level 70 ~ 80 players for each class.
When the player reached new level should be able to choose and use new and better items for his special build and class, not only visually different another armour with almost same protection level.
Whole damage and protection system should be set up for this new 80 level system with new damages and health points. With this new level system all skill points range might be set up between 1 to 25
This system gonna make the crpg more fun, challenging and rewarding imo.
Just a crazy suggestion