Complete disagree with your comments. You are listing a few exemples of dalit politicians as to imply the general conditions for dalits in India are improving.
Let me give you some numbers:
Dharmapuri rampage shows worsening plight of Dalits: Yohannan
Of India's 1.2 billion people, one-fourth are "untouchables." Ninety-five percent of all Dalit women are illiterate.
GFA serves the Dalit communities through its 580 Bridge of Hope institutions bringing education, meals and healthcare to 60,000 children in need. In communities where Dalits are not allowed to draw water from public wells, Jesus Wells are providing clean water for 800-900 families.
More:
http://www.indianet.nl/pdf/CastAnEye.pdf
Crimes against Dalits
According to official Indian crime statistics, averaged over the period 2001-2005:
27 atrocities against Dalits every day
13 Dalits murdered every week
5 Dalits' homes or possessions burnt every week
6 Dalits kidnapped or abducted every week
3 Dalit women raped every day
11 Dalits beaten every day
A crime committed against a Dalit every 18 minutes