
I'm afraid I have to agree with the score. We're used to average games receiving 8-9 just because they were made by a famous company and are incredibly hyped - but the real average score is 5. Dawnguard places just above it. It's fun, but like Xharon said, most of its content we already know and played through a thousand times.
Despite being presented with a choice between two factions with literally opposite objectives, both routes end up sending you on mostly the same errands, to achieve the same thing, and stop the same enemy.
Absolutely true.
It's about as buggy as vanilla Skyrim. Some players will have no issues, others will bang their heads against the wall with frustration. Vampire Lord form, while fun, isn't worth using if you're playing a high level character - it just doesn't cut it when you can suit up in dragonbone armor and smash everything with a daedric warhammer. And it's forced third person...
Writing is fine, but the beginning is very sloppy (take a dangerous vampire home? come on...)
What I like: new perk trees, Forgotten Vale (all of it. I like icy landscapes

), flaming pony, that one guy we meet in Soul Cairn (no spoilers), dragonbone weapons, crossbows. Mostly items and skills, definitely not the story.