I also have the too many accounts comment from TU. Keep in mind that closing a card will not remove it from your credit report. The TL will stay on for ~10 years. I do not think the too many accounts comment hurts too much as I still have scores ~800 with this as my only negative. How many cards and/or TL do you have?
TS - what should you do? Absolutely nothing. Nothing for you to do other than just let everything age.
It's all good. As noted, some of these comments or messages you get are rather generic in nature and frankly, kinda off the wall.
I don't pay attention to any of these notes.