I do just fine with mine, I'm full Bodyguard spec'd. Though lately the class quests seem a bit rougher. Healing wise i can keep myself up. I just have little time for much else. Essentally i heal myself till mobs get bored and go home.
My problem on the server i'm on, I cant find a single tank thats actually tank spec'd. I normally have to turn down healers when starting a flash point! I've seen alot of dps spec'd tanks that try and do ok. We normally make it through with a few rough patches. And i've seen alot of clueless "tanks" that lie about being a tank just to get groups.