Why not just make our personal food restore health at twice the rate? This would give us a reason to actually use it and would be a nice change for when questing and doing dailies.
Doing very rough math the new invocation healing is about 15k hps which is the same as the food from our mage table. The old invocation healing was about 30k hps. And yes I'm ignoring the removal of the cooldown as a factor.
I know people just say don't get hit but I think it would be a nice little thing that could be done just to improve QoL a little.