It is more difficult to stay as a top player than become one. All are gunning for her. Looks like Henin is on the way down. She has achieved all and maybe motivation is just not there! Her personal life may also be taking the toll.
Some lessons for us also. Let us go easy on Sania. Hope she can rise again and is left alone to reach wherever she can! Without Sania, tennis fails to excite at least some! Love her or hate her (why? as some do) we miss her, especially the guys.