If the dps is actually "good" then they know they'll be needing to use their aggro dumper when needed. No reason not to bring it and use it when needed. So no tank should ever have any hate issues, ESPECIALLY considering that weaving a hate dumper in your rotations is just a simple matter...especially if you want the party to be as efficient as it can be. No reason to stop DPSing just to ensure you've got your aggro in check anymore.