HP Fire Greninja is more useful then HP Grass. Also, Grass Knot isn't only to deal with Rotom-W, it's for pokes like Gastro, or other bulky water types that completely wall Greninja (usually).
I agree, saying that it was a big lie was pretty rude/assy sounding by saying that, but I didn't mean to give off such a negative demeanor. I definitely could have rephrased that to get my point across and still be much more friendly.
And we do have our own opinions. Sticky Web is a lot less common now too,