It was a good idea to power up these bosses.
Why? If they didn't flinch, it would be impossible for the poor NPC to fight back with certain chains of attack.
If they didn't have alot of HP, they wouldn't be called a boss.
If they didn't have high damage... well, this ones a little cloudy to me. The damage is quite high, yes, but soon we'll be getting a huge amount of new items, gear, and weapons.. also higher level equipment. I guess it makes you work a little more and requires you to use blocks, which encompasses all functions of conflict you have to choose from. Guessing it's silly of us to think we can just go ahead and hack/slash constantly until the enemy is dead like in other MMORPG's.
Also, don't forget the amazing useage of Lieutenants... they have some amazing skills. =)