I am curious as to how much the range increase of Sap will be useful.....I am even more curious how you can explain it. Do you throw your blackjack at the mob?
They aren't removing the talent slot, but to force people who have the two in that talent slot to spend 50g to respec is not right. They'll refund the talents so you can choose to take it or not.
2/4 yards might help when trying to sap guys next to stealth seeing dogs or something heh, you can sometimes get the sap off right as the dogs see you now so an extra 4 yards might be a good buffer. I would rather spend the points elsewhere, depending on the spec that could be 7 points used just to get imp sap but I think its invaluable in 5 man instas so I keep it now