Depends on the boss fight. Zelda had some of the most epic boss fights ever. But yeah, the bossfights in Deus Ex HR are pretty weaksauce. Just stupid AI with a ridiculous amount of HP and no particular integration with the actual gameplay.
I found Deus Ex HR alright for bosses, although Barrett was a bit of a pain the first time through. If you've got enough ammo for your stun gun you should be ok though, its stops him for a few seconds, just enough time take some shots at him, plus the stun gun takes hurts him. If you can find some grenades lying about you…