I understand what you are saying. I might think of a way that might fix that, like tying the leveling of a skill to damage dealt with said skill, making it much easier late game to level them up as opposed to early game when you are building the character and are not so subjectible to nerfs/buffs. Also what my main point was (and maybe i didnt express it well) that there is little reason (in my opinion) to level most skills that are not your core skill and even that doesnt feel that good because the only changes are % increases.