I'd say debunked is a bit strong. From the article you posted...
The researchers note that ice bath research has produced such a wide range of conclusions because there is not a "standard protocol" for the technique.
Though the finding from the study that using an ice bath post-workout is not an effective way to mitigate soreness, Crystal is still "not convinced" that they are a complete waste of time. She says:
"Use them sparingly. Use them in tournament situations, use them with an athlete who has done something extraordinary. But for day-to-day athletes, I wouldn't recommend them. They're painful, and they're time consuming."