Actually there hasn't been any vitriol and name calling at all. People read into things differently, especially on forums boards where that face to face communication is not possible. And when people are passionate about their positions they have a tendency to read badly of the other side.
When GMing this game, I don't allow my players to use Triumph to knock people down. A couple of reasons for this. 1) There's a talent, 2) RAW do not say you can spend advantages/triumphs to knockdown. But what about the narrative... just give me a second, I'm getting to that.
I'll let people narratively use the Triumph to knock people down. I don't have an issue with it. However, it has to be a good narrative reason. I don't just let it happen cause you got a Triumph. When I get complaints, I tell them there's a talent for that. Good reasons do not mean "suddenly the falls" or "suddenly, exploding barrel". Exploding barrel is funny, but unless you are in a room with a bunch of exploding barrels, go ahead and spend that destiny point to make one magically appear.
There is a reason I do this. If you make the talent useless, you are screwing over two classes that have that talent in their trees. And while the Marauder can pick around his 10 point version, the Fringer can not. In fact, the Fringer's version is 20 points and must be taken in order for them to get two ranks of Dodge. How am I supposed to explain to the Fringer he has to spend 20 useless points of xp for a talent just to get to Dodge?
So instead of doing it, I stay close to the RAW on this issue.
THAT BEING SAID:
As I stated before, I don't have a problem if FFG wants to look at the Knockdown talent and change it in some way.
Honestly, the easy fix that they could do that would make everyone happy is not really a huge change in the end. It's actually a deletion. Of one word.
Simply delete "spend" from the knockdown talent.
This way, people can spend their triumph to narrative knock down anyone they want. And it doesn't lessen the talent at all, because now melee users with the knockdown talent can now knock someone down for free without spending their Triumph, meaning that Triumph is free to be used for whatever else. This gives the people with the talent a clear advantage over people who don't have the talent. And it makes the talent less useless for its point value in xp.
Everyone wins.