PMBOK is one of the primary references for the exam. Some of the updates you can expect to see surround lexicon changes and terminology used within the exam as well as harmonization of process groups, tools, and techniques.
Lessons Learned; in writing Exam LL, the writer is not supposed to discuss the questions in detail but only their study approach, experience and knowledge areas covered, no details. However be extra careful when the writer discussed websites and study materials and tools. Most of them might not be around anymore now!
No impact: Any topics that are not from PMBOK: statistics, general management and also basics of Earned Value, Tornado Diagram, Pareto Law etc.