My thoughts exactly. To be honest, I don't understand at all the -4 only for quads, but I also find it hard to believe that the ISU is trying to discourage quads. And I know that one more point doesn't make all that much of a difference in scores/placements, but the logic (or lack thereof) behind the change irks me.
Think of it this way.
Another way that GOEs could be calculated would be as a straight percentage of the base value for each element.
In that case, the value of -3 for a 10-point element would be greater than the value of -3 for a 5-point or a 2-point element.
Essentially, that is what the ISU is trying to do with making the values of the GOEs larger for higher value elements than for lower value ones. For whatever reason, they originally chose to set the values of the GOEs at strict 1, 2, and 3 integers for triple and quad jumps, and they have made some adjustments since, but they have not chosen to use a straight percentage.
Maybe the percentage approach would be clearer. And then we could debate whether the percentage for +1 or +3 should or shouldn't be the same as the percentage for -1 or -3, respectively.
The fall deduction is separate from GOE reduction.
It's possible to fail seriously at an element without falling. Sometimes the failures are just as bad as falling from either a technical or an aesthetic perspective. But they don't also incur a fall deduction.
It's also possible to fall on nothing, or on a singled or double jump, in which case the skater gains at most a few tenths of points for the element and loses one whole point for the deduction, so the net effect on the skater's total score is negative.
1.0 off per fall is negligible for skaters who can rotate quads and land multiple triples.
But it's significant for skaters who are only doing double jumps or maybe attempting but not necessarily rotating and landing a few triples.
So any change to the way falls are penalized in order to make sure that fallen quads lose a bigger percentage of their base value needs to be applied in a way that does not overly penalize skaters who are nowhere near attempting any quads.
All senior men will always compete under the same rules. So far, all juniors and seniors in all disciplines have also been using the same rules regarding falls -- and lower levels as well.
The US has just changed the fall deduction from 1.0 to 0.5 for juveniles and intermediates, since almost all the jumps at those levels are doubles (and single axels).
If the ISU were to raise the fall deduction for senior men to something significant enough to make a difference between two medal contenders when one falls more than the other, they would need to not raise it the same amount for senior ladies or for juniors and preferably leave it at no more than 1.0 for novices.
Or they could just change the fall deduction to a percentage of the total element score.