I am completely fine with the level cap at 10. By having such a low cap, more time can be spent on good plot, story writing, and coding, and less time trying to fix martial/caster disparity or bugs.
Pathfinder Kingmaker has way more spells, races, than this game will gonna have and ... LV cap = 20. Wrath of the Righteous will bring epic options, including lichdoom path, path to become a golden dragon and so on.
PS : The disparity of martial/class is NOT something that needs to be fixed. People compare lv 20 wizards with every money in the world to have a libary full of scrolls and time to rest after every encounter with a poorly equipped lv 20 fighter. And it is just dishonest.
A game who starts with mindflayer spelljammer ship fighting over cities being a low level kobold slaying on sword cost is very disappointing.