The knife is still very easily exploitable if a Predator is playing aggressively to secure a kill on a downed Fireteam member & people just rush the Predator with it. Even moreso if it is a less spatious area that the Fireteam member went down in. The damage & DPS is already ridiculous enough without the triple hit exploit & the double damage exploit. Not to mention the automatic tracking you get on the Predator if you just move either clockwise or counter-clockwise in a circle while stabbing them because the game locks your camera to the Predator while you do this until they create enough distance between themselves & you.
The hitbox is also broken because I have had many games in Private Matches where I literally get stabbed while in mid-air & stabbed from several metres away. That aspect could be ping related but nonetheless it should be pretty clear that there is an issue with the knife being broken when a single Fireteam player can solo a Predator in a knife fight very easily & consistently. The parry system is also heavily flawed for obvious reasons (being able to continously parry a Predator & keep them stunned while stabbing them repeatedly) without even delving into the part where you can get parried by a Fireteam member who literally isn’t even facing your general direction.
It would be incredibly disingenuous to say that it’s perfectly balanced or normal for a single soldier with a small combat knife to be able to kill a 7ft+, 520lbs Predator with a huge Yautja Axe, Sword, Combistick etc. You never see it happen in the movies.
We know it’s in the game, we’ve all learnt to adapt to it over the years & anyone with common sense will avoid knife fights. But, just because we know how to counter it, doesn’t mean it isn’t a problem.

