2. enemies are level-based, meaning the higher level you are, the higher leveled the enemies are. and Volkihar Master Vampires are a [censored] to kill
Do you think so? I found that enemies in Skyrim are way underpowered once you reach level 30 or so, I'm not speaking for Dawnguard as I'm waiting for it on PC rather than try to play the crashing, freezing nightmare known as the Xbox version. Once you get some decent perk levels and armour the game really becomes way too easy, as a stealth archer I'm pretty much invincible even on the highest difficulty setting and my character is only level 54, that's not that high compared to some players.
The end game was a cakewalk for me and to be honest a bit of a let down. I honestly think the scaling needs to be increased a lot to compensate for armour and weapon enchantments.