I'm at my phone not my desk, where I have a bunch of the data. But my understanding is this:
There are two competing plans at the moment for property tax relief, not one. Wolf's is the lower of the two. The one being pushed by the state house/senate provides a greater reduction, in some cases 20% higher.
The actual plan will likely be a compromise between the two, so Wolf's figures are probably a lowball estimate if I had to put money on it.
In addition to the property tax overhaul (which both sides want, simply a matter of degree) Wolf is pushing to establish a state funding formula, and possibly eliminate "hold harmless". Both of these would result in drastic changes to how money is distributed without raising new revenue.
Obviously more revenue is better than less, but nutters arguments for the property tax increase takes none of the above into account.