Oh, I understand the appeal of alternates, as any game I run turns into an alternate the moment the dice hit the table; I just don't see the appeal of setting it so far down the road.
It just sounds like more work on setting than just blank slating it from the get go.
I use the canon star wars because doing so saves me time and effort. It provides baselines my players know, and lets me not worry about setting building...
a 1000 year jump ahead disconnects it from 90% of what I use the Star Wars setting for. Either by being essentially writing a new setting almost from scratch, or by ignoring that no culture is stagnant for more than a few decades, and through that oversight, obliterating any verisimilitude.