I have the book. That's not in it. What is in the book is something that frequently issues from the mouths of successful lifters when questions like this come up...don't bastardize programs, and don't overthink your training.
Jim has said many many times that "Dynamic Effort" training has no place in 5/3/1. He says it in the book, he says it in articles on this site, he says it in the Q&A on Elite. 5/3/1 is built for raw lifters, and very very few raw lifters get anything out of traditional DE work. A small minority do, the vast majority don't...don't use the exception to prove the rule. So if my opinion doesn't carry any weight with you maybe the author of the book's does.
If you and/or the OP are lifting at a high level, then you already have a good feel for how to modify your training when things get stale. If not, you need to figure that out and listen to people who are stronger. And most of these aren't big on mental masturbation, elaborate "programming", or "hybrid" anything.
And when guys come into the gym blathering about brand-name programs and this or that newfangled thing they read on the internet, we know without a doubt that (1) they are weak as shit, and (2) they won't last. That's my issue. Sorry if it's distasteful to you but it's reality.