As someone who plays her, great for solo queue, not so great for coordinated teamplay where there are stronger support options overall. She's basically there to keep your teammates from dying and keep threats off your carry, which she's very good at doing because her Q stops a lot of dashing gap-closers and her ultimate just resets stuff in general (on top of some of the flashy shenanigans you can do with it to push enemies in a certain direction). She's also ridiculously fast herself so she's just slippery in general on top of the peel she provides for her team.
As much as her abilities are watered down, she still does the same stuff she did 6 years ago and indirect buffs like Windspeaker's Blessing at least give her a new lease on life.