I think the system is solid. Automatic advances with leveling with extra points/feats. Give the players options at leveling is always good, always. On the spellcasting for non-spellcasters, it should be painful, i.e. it can't be so powerful that's just a 'must-have' and all characters end up being spellcasters. There could be other restrictions of course, like higher rate of failure on bigger armor, etc.