I don't think it's that bad if you have a basic understanding of how tanking works. I've been tanking in other MMORPG's for years so I naturally picked a tank in this. I've tanked with the Marauder, Gladiator, and most recently I finally got a chance to test out Paladin tanking and while it does require more effort than tanking in a certain other MMORPG, it's far from impossible.

Some advice:

1. Remember you can use abilities from your other classes in your toolkit. This will give you additional defensive cd's and even a heal.
2. Mark targets
3. Tab-target through adds to keep threat on all of them. Flash alone isn't usually enough.
4. Don't be afraid to use crowd control