I just watched a few fight scenes from The K2 on Youtube. These scenes are not good, imo. They keep cutting from one shot to another too quickly so I can't see what's happening, and I'm not convinced that these actors know how to fight.
If you want to see great action, I'd recommend watching some Hong Kong movies from the 80s and 90s.
Some of my favorites are Eight Diagram Pole Fighter, Police Story, Once Upon a Time in China, and The Killer.
I noticed that you rated Ip Man 10/10, so you might want to check out some of Donnie Yen's other movies, for example Iron Monkey and SPL.