oh, I hear you, the Revan thing was a REALLY CHEAP TRICK from a storytelling perspective.
still, there would be advantages to having a fixed surname...for instance, the NPCs (such as the elders on the council) could call you "Padawan Stargazer" with full voice over. they could also speak of your uncle "Zak Stargazer", etc.
I think a fixed surname would essentially be the best of both worlds: enough backstory to flesh things out while still providing you with control over gender, appearance, alignment, etc and without having to worry about which playthrough of the game is "canonical" and crap like that.
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That isn't a bad idea; it would also be easier to flesh out in novelizations, instead of constantly referring to the Jedi Exile as the Jedi Exile (which is probably why we won't be seeing her in very many [if any] comics)