Fine, you take the aggro. But don't expect any heals - that was me, too.
Not all tanks without a dps mode are one-trick ponies. There have been several people who have posted here about sorc tanks, cleric tanks and favored soul tanks. Sure, we can all just lesser into evokers or healbots, but that's not the point. If that buffer isn't enough to hold aggro, a lot of current original builds are going to die, and I don't think the buffs to S&B are enough to create new original builds. We'll just see lots and lots of hate tanks.