Right now the skill system feels a bit too samey to me, and a bit claustrophobic. I feel like I have to pick the three skills I want to become legendary in, then never venture away from those. In an effort to add a bit more breath to the system, I've been thinking about instituting the following house rule:
If you use a skill increase to raise a skill to below your maximum proficiency, you can increase the proficiency of a second skill, as long as the resulting level of proficiency is below your maximum.
So for example, at third level you'd have the choice of raising a skill to master, or becoming trained in two new skills. At 7th, you could raise a skill to master, or two trained skills to expert, or become trained in two new skills, ect.
I was inspired by the stat system, where a stat boost above 18 only adds 1 to the stat. My idea is kind of like that for skills. So, what do you think? Any just glaring problems with this that I'll regret? I'm a little concerned about rogues, but at the same time, they are supposed to be skill monkeys.