I'm personally for making Rescue more like BLM's Aetherial Manipulation that let's you slide to an ally's side. Problem seems to be though is Rescue is more of an interruption action (like Holmgang) rather than a free movement one, you can use anti-knockback (Arm's Length, Surecast etc) to even negate Rescue.

Having the response of the action be well more responsive would be nice, who knows if it could ever be adjusted, probably not a priority. However if I could be Rescued and use an (insta)action while still in transit because it doesn't cause interruption that would be amazing, but I don't see that happening.