She will play so many tournaments... Scary...
first, its just a pre-made list, nothing written in the stone.
21? it's not that much. 22 with fed cup.
and i'm not sure she can play all this, or wants to play qualifications. depends on her ranking.
don't know about new rules right now, but i think she has no what-so-called "commitments", so she can do or play whatever she wants.