They would provide infinitely more info, guidance, or story/scene setting for maps, be it single player or multiplayer.
It just seems like such a BASIC feature that requires a simply textbox that would make a huge difference to the authenticity or guidance of maps.
Halo Forge does it's map sharing best, and I think Ubisoft could follow suit.
They should add text option it to the way points you can set and the text should show in the hud. Now you can set new way points, but nobody will notice because its not directly visible to the user that there is a new way point. The bad word filter is not necessary. They gave us the A to Z already and I have not seen anybody abuse it yet for bad words in their map even though they had the option to do so.