Well, your dimensional specifications look good to me.. The datum's B & C define a center plane which are being used to locate the threaded hole feature symmetrically about the related slot features.
You have related the slot feature on the opposite side to a center plane defined about datum B-C. I would have gone a step further and related the datum slot features to one-another though I suspect the default tolerance block and the center line does this for you.
Additionally, there is not a horizontal relationship for the threaded features defined or shown on the drawing so, I don't know how well these features will be centered relative to the related slot features (left and right).