The latest version of InDesign has one of the best features (new?) that I have come across in a very long time. I'm actually excited about it!

It is the share for review feature. This is a huge game-changer for in terms of controlling proofing and review.

I use Illustrator to create large format text panels, and this exact process would be amazing to have as well.

I am not aware of anything in Illustrator that allows this same type of collaboration. Perhaps it is there but I do not know of it?

With the move to more online PDF proofing, being able to do this directly from Illustrator and to have those changes show up in the Illustrator document that can then be resolved dynamically would be brilliant!