Just because people don't know how to play Magister doesn't mean it needs a revamp. There are very few magisters, including myself who has over 72 Necro DC. We know how to use its passive abilities wisely. Don't compare divine using exalted angel to wizards using magister, those two are absolutely different. First of all, divine casters are nothing compared to arcane casters. 2ndy, Magister is spell manipulation destiny. It adds unique passives to chosen school: caster/max caster level, dispel, save reduction. It might sound underwhelming, because draconic + shiradis are easy to play and very straight forward = dps, burst damage.
Heh... if I login into my wizard magister now and compete with any OP builds out there, I'll win. So giving magister more power is always welcome
