Embedded in the idea (among some top pros) for making baskets smaller is the idea that this would widen the scoring spread. However, unless the change also makes short putts tougher, scoring spread could narrow rather than increase even though scoring average on holes would increase.
Consider that making the target narrower will reduce the number of putts made from say 15-50 ft among pros. However, it's likely the number of misses from 15 ft and shorter will likely not go up much, certainly not as much as the percentage increase in misses outside 15 ft. What's important here is that pro misses in DG from outside 15 ft typically end up inside 15 ft for almost automatic hole out on the next putt. So while the number of 1-putts will go down with narrower baskets, the number of 3 putts may barely increase at the pro level thus narrowing the scoring spread.
However, if you look at the proposed basket changes in post #94, not only will you reduce the number of putts made outside 15-50 ft, those 7-15 ft will not be as automatic leading to more 3 putts. This change would be more like the ball golf dynamic where a significant percentage of their pros missing putts from 30+ ft end up far enough from the hole (2+ ft) that they are not automatic hole outs on their next putt.
This scoring spread dynamic is why the current basket works well for players below say 950 rating because a first putt thrown from 15+ feet has a good distribution of holing out from immediately to 1, 2 or sometimes more putts needed. However, as the player rating increases above 950, this reasonable Am scoring spread for putting on current baskets decreases. That's why having an alternative set of challenges for pros to hole out, that maintains the wider putting scoring spread amateurs see on current baskets, would be needed to achieve what some top pros would like to see happen with tougher baskets.