*Sigh* So 9 new spells, 2 new large areas, 5 new unique weapons, 4 different crossbows, two new perk trees, two new factions, 6 types of bolts, a large amount of side quests and radiant quests, A very large amount of new enemies, new armor sets , and alot of other stuff aren't worth 20 dollars?
Let's put this in perspective and compare them to Fallout DLC. Why Fallout? Because unfortunately past TES games got expansions, not DLCs, so it's not exactly a fair comparison, though we could attempt that too:
9 new spells = Let's say perks in Fallout, as both spells and perks are "abilities" in some ways. Broken Steel offered 14 new perks whereas other FO3 DLC offered ~3 perks (gained via challenges completed rather than levelups). FO:NV DLC gave between 6-17 perks.
2 new areas = Most past DLC offer one
5 new unique weapons = Past DLCs for Fallout easily achieved this, many achieving more with relative ease. One look at Old world blues for example and I see 14+ weapon types.
4 different crossbow types = Does this really matter? They're all functionally the same, with one type being all around superior, right? Shouldn't this just qualify as the above "unique weapon" type? I mean OWB has like 4 different types of unarmed weapons that are functionally "the same" (they actually have varying balanced stats, but look the same) and I didn't count those as individual weapons; I see them all as one weapon type.
Two new perk trees = Yeah if we compare FO perks to TES spells then yeah, none offered something like this. Save for Old World Blues, which offered new traits. (like 6 I think?)
6 types of bolts = Again these just seem like a package deal with crossbows, not really a new feature.
"A large amount" of radiant quests, "a very large amount" of new enemies, armor sets and "alot" of new other stuff? Well I can't compare cause I dun have the numbers.
Keep in mind the Fallout DLCs had shorter production time and costed half the price of Dawnguard
My point?Look, you can list off just about anything and make the DLC seem big. I mean I could say OWB offered 11 new perks, 6 new traits, 14 new weapons, a large new area, 35 new locations and 16 sidequests, and wtf it sounds huge. What matters though is the actual quality of everything BEHIND those numbers. Listing off numbers seems frivilous and pointless, as 1 location in Dawnguard =/= 1 location in Skyrim/FO3/FO:NV/whatever. It's not something you can really measure numerically.