What's the duration? Anything more than the spell line we...already get? With farming changes I don't think anyone is going to be all too concerned to have a pet go awol for a bit (assuming it doesn't pull mobs, and I've never seen mine even get feared...ever.), the larger concern would be the mage themselves getting feared.
Are those dragons any different with the roar now? I've fought pretty much all of them. I've never seen my pet get feared. Unless their hit animation continues when they're feared he wasn't.