EU was a sea of toxic filth with alarmingly small amount of competently written and good material in it, which once recognized as good had every other half rate writer trying to pin their next bad idea on it.

I remember running across a D6 dice rolling table for generating the plot of the next Kevin J. Anderson book when I was looking for West End Games SW tabletop supplemental (or fan-created) stuff on Geocities.

If the table had been juuuust a little more generic for things like "qualities possessed by big bad", "motivations of antagonist", "reason for melodramatic interlude", and "type of mcguffin" it probably could have actually been used to generate future books.

Owing partially to LucasArts restrictions, a LOT of the EU was pretty derivative/formulaic but most of us didn't care because it was MORE STAR WARS in an era that hadn't seen any for 15+ years.