Thats arguable. For us Xbox players, Dawnguard is a nice addition to the game, and oh wait! we don't get the constant crashes that are assosiated with installing and playing mods.

I enjoyed Dawnguard and still do.
person by person. Some xbox players are getting crashes and game breaking bugs in dawnguard, remember just cause you don't have it doesnt mean others won't.
Sometimes the only way to fix some issues is to delete the saves associated with dawnguard which you can imagine is horrible for some people.
And I use mods, no crashes. Over 40 mods installed adding new spells, weapons, NPC's, houses, armor, and armor retextures.