The only thing WAR needs, is more reliable HP generation, and maybe moving the 15% healing buff to defiance instead of wrath.

IB shield (instead of heal) that stacks with SCH shields and stoneskin could be interesting. War also needs a way to dump aggro when doing certain 8mans. Apart from certain bosses, it makes no sense to have two tanks in those.

Before today, I was a terrible war tank, but after discussing the job with a pld friend of mine, whose wife is a healer that I've run instances with. I figured out how to play properly, and I now have no problems tanking the 50 instances up to and including HM ifrit.