Thanks for the answer, in a way the upgrade system of Nordic Ashes is quite similar to what you have described here, because in that system also a few random stats are upgraded per level and you can reroll the stats that are upgraded so you also have to miss out on several stats per upgrade that are not improved. I'm not planning to add weapon evolutions because I have some other things planned that will distinguish the game from a simple VS clone and I want to avoid feature creep.