A thought would be to throw in add edits to the areas you want to lower and move those sections down to new audio track(s) using the segment tool.
Then highlight the entire new audio track(s) and adjust one section to the new lower level, making sure you have the “apply levels to in/out” (or whatever it’s called) on.
Once that’s set, move the sections back up into the original positions on your original audio track(s) and apply dissolves to all in/out points.