The changes to fighter and paladin won't change anything unless we get working aggro management tools. Right now, intimidate and diplomacy don't cut it. They need significant re-tooling if pure tanks are going to have a place outside of a few select raids. Unless tanks can reliably pick up aggro, they're just hurting their DPS by taking top-tier tanking enhancements.
My suggestion: double or triple intimidate's range, increase its effect, and make it instant-cast. When a big, armored tank walks into a room, he should get the mobs' attention.