The fact Malachor is even mentioned makes it a subtle Revan mention.
"Scourge of Malachor" is referring to the ****ing Battle of Malachor V where, you know, the planet got scourged... by Revan. 😐
Of course it's the canon version, which I assume is a lot different from the Legends (hence ares' comment), but not thinking of Revan when reading "Scourge of Malachor" is just laughable.
Except it's not. 😬
It's not a reference just because it's using the name of a place. Lucas wasn't referencing the EU when he used the name Coruscant. It's not a homage to Revan in the slightest. Using HK may have been, given that it's actually a character, a non-canon one at that, but using places, hell only the name of places, isn't a reference.
I'm going to say this nice and slow:
1. Referencing a place is not referencing a character, in the same way referencing a Sith Empire isn't referencing THE Sith Empire from TOR.
2. Even in Legends, Malachor is an ancient and key Sith system that has plenty of time to have plenty of "Scourges" and it was a haunted and taboo world before Revan destroyed one planet in it.
Stop being retarded. If anything, you just proved half the morons on the internet you used as people agreeing with you that it's reference don't do research.