I think CC resistance is precisely the sort of thing that role actions could address effectively. I really like the idea of individual players having the choice to add such a defensive tool, or skip it in favor of an offensive one.
I do hope the devs keep their eye on the ball as the players experiment with these role actions, though. One of the main problems in 6.X was that they basically left it alone for way too long, despite the obvious shortcomings once the meta had stabilized.
I also hope everyone involved in matches actually has the role actions on their UI, but I'm not optimistic.