Love the game and the approach you guys took on this. I would like to offer a first reaction in my journey to level a char after finishing up the story line. Lack of goals. I know, gearing is there but that in itself is not enough. As the game is evolving I would love to see some goals that help build the char (a couple of extra skill points, an extra skill slot etc.). Something that gives you interim goals to aim at and that drives you forward in your progression.
While I do not want to do any comparisons with poe their trials serve that purpose and gives rewards and something to gear for in the interim. You have a great foundation and as you build the game out, please consider that at some point :-).