Pretty much! I'm actually rather fond of the idea and think it compliments her powers. The fight with Captain Marvel is a perfect example of how it should work. She basically becomes a drain tank, you want to get away from Rogue as far as you can, because even if you are physically equal or stronger than her; she'll slowly sap your strength away. Her touch-based absorption should be much more potent, as shown with her encounter with Apocalypse in Excalibur.
I don't think it's makes her overpowered as its still not an ability she wants to use most of the time, since unlike the touch-based absorption, she has little control who she absorbs and it's since it's an area of effect can easily harm allies if she just turns it on in the middle of battle. She needs to be very careful about where and when she uses the ability, which I think is limit enough. Also KT explicitly tied her control to her feelings of fear, so it's a second weakness.
If she gets spooked, it's sort of a massive liability tbh. Example when it first becomes active.