Totally agree. When i see the scat tag I instantly expect a good chunk of the story to be about feces.
WS, watersports, piss, or urine would all be good tags for pee play, again, more than half a sentence please (piss is a big kink of mine).
The snuff tag does seem to be more or less pointless here, but a non-snuff tag is very useful.
As for cons, semi-cons, and non-cons I generally assume (and it seems to be) that this refers to the death, not the sex. A rape or non-rape tag might be clearer and I've seen these with the con tags before.