Denny,

Spot on, absolutely key phrase:  "constructors now need to be reusable, they need to be more like modular sentences"

However, my prediction is that the abstract renderers will indeed need "modular sentence" capable constructors which is definitely at odds against skipping this capability within
"We do not have to go through these particular levels, and we don’t have to be uniform about the levels in the different domains."

"modular sentence" capable constructors is pretty much the heart and art.
However, the degrees of modularity needed will be wonderful to watch.