I try to cut the West End books a lot of slack. Back then there was no know knowledge, and all they could do was make that stuff up. Heck a lot of what they made up ended up as canon.
I actually once had a chance to talk with Timothy Zahn (many years ago), and he said that when he started writing Star Wars novels he was given a stack of West End books and told to use those for source material.
Much of there stuff does still make good source material. I can look at ship stats, like a Star Destroyer, and get a basic idea of what they have, then translate it into Edge of the Empire terms.
Edited by Split Light