Dharmesh,
A CBC in a transfusing patient is not of much value, as it reflects the state of the transfused blood. MCV etc will usually show normal when regular transfusions are taken.
If your transfusion frequency has decreased with hydroxyurea, then continue it for a while to see if there is anymore progress. Make sure you take wheatgrass with it and also add magnesium and L-carnitine if you have not already done so.