The point of no one complaining about past "expansions" is moot.

Just poking fun Bethesda billed KOTN as an expansion and it was not.
I will not argue that more is better because it simply is.
An Interviewer called KOTN expansion once. Bethesda practically yelled at him claiming that KOTN is a big DLC but still not something worth calling an expansion. So no, they didn't claim it, journalists did. SI is officially the only expansion OB has.
And AFAIK, Dawnguard is also treated as an big DLC rather than an expansion.
Then Morrowind had even better longer quest with an even better magic system but the Game was far uglier than Oblivion without mods of course.
80% of MW quests were on Skyrim Radiant Quest level of qualits: bring A to B and clean a dungeon consisting of two or three rooms.
Only the MQ and FG&TG questlines were something worth talking about.