Thanks for such detailed feedback with examples! This is really valuable info for the team.
About the visibility of Tab suggestions: this is a known issue, and the team is aware. Unfortunately, there aren’t any settings right now to change the contrast or the suggestion display style. Your examples clearly show where the current visuals cause problems.
On the multi-cursor behavior, there are similar topics, like this one:
This will help the team prioritize and track each idea separately.