Just was surfing the web and stumbled along this. I think its pretty cool and I'm happy to see that somebody has already done it. Josh Kalk (writer for THT) has posted the WE by count on his blog.Here is the link to his blog and the WE table.
Tie game in the bottom of the 9th and bases are loaded with 2 outs
Count / WE
0-0 / 65.8
0-2 / 60.1
3-0 / 76.1
Thats a pretty big difference just based on the count. I was hoping the difference would be bigger than it is for more situations. In most cases the count would only change the WE by fractions of a point within an AB.