I don't mind it as long as it isn't racial in origin. I always felt like Outlander should have been used for non-Dunmer races. When playing a Dunmer, it felt so out of place having your own people use it on you. If they wanted it to mean stranger, I wish they would have used that word instead.
In Morrowind, even if you play a Dunmer, you're still an outlander, the term "outlander", as its name implies, can refer to anyone not native to Morrowind, this includes Dunmer born and raised outside of Morrowind, and due to the requirements of the story, in Morrowind, you would be someone not native to Morrowind, even if you were a Dunmer.
Maybe they'll just call you "Dragonborn" in Skyrim though, since that's what you are. But that kind of sounds a bit too heroic to be used by people who don't like you, hopefully, Bethesda can come up with some creative insults for characters who aren't fond of you.
The way "outlander" worked for Morrowind was because you came from Cyrodiil... but then again: how did EVERYONE in Morrowind know that?
I think the idea is that they could tell by your accent, obviously, the players can't tell what accent their characters speak in, since the player character has no voice outside of grunts and cries when getting hit in battle, but since we can probably assume that you're actually talking when engaging in dialog with NPCs and your lines just aren't usually shown, NPCs can still hear your accent. And some dialog in the game seems to suggest that outlanders can be easily identified by their accent and ignorance of native customs and cultures.