I completely agree. Battlemages are always way more interesting in character than a mage in a robe. They should always be allowed light armors like leather armor, studded leather, etc. Then they should even be able to trade in certain abilities for medium type armor. Heavy armor like full plate and stuff should be off limits and medium should come with some sort of restrictions to their magic abilities but heavy armor should either be not allowed or allowed but be so penalty heavy, it would be stupid to wear it.