So as I understand it, part of the goal of Hafen was to provide "meaningful character development" where different characters had different experiences and was therefore qualitatively different.
I would argue that this has not in fact happened, sadly. And the experience system doesn't provide any sort of limit to development, and is quite easily gamed if you can be bothered.
The whole of the LP system is still essentially just watching numbers go up slowly.
One thing that is quite "nice" is the combat discovery system; but again, once you have unlocked all the moves your character is no longer different from any other dude wearing a sword and shield.
This thread is more of a question to Jorb and Loftar: do you intend on revisiting this issue sometime in the future? Are you going to move away from LP just causing numbers to go up in a wholly predictable way?
if anyone wants an actual "suggestion": There are lots of ways you could approach this: for example, in combat, instead of new combat discoveries giving you a copy of a set move, you could use them to upgrade your existing moves in many different ways: cooldown, weight, damage, etc. This would get rid of the need for UA and MC, essentially. Likewise when crafting, say, a pickaxe, you could get a crafting discovery that allows you to improve that particular recipe in some particular way which you could choose.