The author touches on a really important shift in how diversity advocates have approached their goals in recent years: the relative abandonment of meritocracy as a desirable thing. Whereas before, they advocated affirmative action and similar solutions as ways to slightly tweak merit-based systems to benefit historically disadvantaged populations, there seems to now be a more widespread rejection of those systems as inherently discriminatory. The only transformative net effect, it seems, will be to significantly reduce the proportion of Asians across elite institutions.
You write as if our institutions will always remain healthy and the only uncertainty our future holds is which groups or which individuals will get which share of the "pie" (or "prosperity") produced by our healthy institutions.