I was watching this video that goes in-depth on what is known so far about Krushing Blows and I came out very impressed. Even during the exhibition matches during the reveal even this mechanic struck me as a game changer in regards to the meta game in competitive matches.
I don't think any other fighting game has a similar mechanic, and its properties and the way it's triggered seems like it can mean a completely twist in a match or in a particular round, as the Krushing Blow can be used to greatly damage opponents (or open them to big combos/damage over time situations), so I'm thinking competitive matches of MK11 will be even more exciting seeing as how the professional players will surely be on the lookout both to use their Krushing Blows as well as not letting the opposing player use theirs.
I'm making this thread because I searched for the video's title and thought no one was commenting particularly about it, but it seems like a great way to gain enlightment on this particular and (at least IMO) unique mechanic.
Edit: one other thing that I think it's worth it to point out is how this mechanic seems to have originated from Brutalities from MKX. And I think it's really great how NRS took a mechanic that was mostly for bragging rights or show to create something that actually affects gameplay in such a way.