The new team I've been messing around with has a huge benefit - stealth. I'm running an assassin tank with three operatives (level 23) and it is really really nice to just stealth by most sets of mobs that are in the way of mission objectives. With the stealth speed buff talents they still move at 100% speed when stealthed, so it doesn't slow things down much.

I wonder if flash points could be largely stealthed through to just down bosses and get loot...