OK... It's the end of the day and my drop down layer menu still has very little, if any, lag. Every once in a while, after working in other programs, it will take 2-4 seconds to open but after that if goes back to normal. Right now it is comparable to my AutoCAD LT 2019.
This fix still looks very promising. However, while the drawing set I'm working on has been open all day, I was paying more attention to other things in the office. I only worked on the drawings for a few hours total. I'd really like a full day of intense drafting before I can call this completely fixed.