[css-selectors] descentant up to a certain depth

Is there any plans or ideas to simplify selectors like this:

elem1 > elem2,
elem1 > * > elem2,
elem1 > * > * > elem2 {...properties...}

i.e. all elem2 that are children, grandchildren or great-grandchildren of
elem1.
More generally, a descendant combinator that let us specify the max depth
of the descendants.

If not, can I propose a solution?