Most of us wish to start fresh, ignoring virtually the PT and EU sources. Only EU books I've read in the past...many many years...were the Bane series and they were a gift. It sounds like this Plagueis novel was quite enjoyable for you. How would you see it providing much fodder for Episodes I-III, since it's a prequel to the prequels? Maybe it was a more interesting story to tell?
Originally, Sifo-Dyas was called Sido-Dyas...
I once read or watched something that claimed it was an intentional change because Sido-Dyas seemed too obvious and that the Jedi should (at least) be able to unravel a simple word game.
Do you feel that the novel provides a more interesting and relevant backstory to Episodes IV-VI?