I think his milk intake looks OK to me. If you think you would like him to have more dairy, you could try smoothies, most children love them and they are tasty, too. I make some for myself and Anna, and she adores them, we don't add any sugar, just fruits and milk (I actually use soy milk).
Well, anyway, weaning is a process that usually takes time, actually we start weaning with offering first solid food. If your lo is ready, and from what you wrote it seems he may be, I would drop the evening feed first and see how it goes from there. Observe him to make sure he is comfortable with that, offer some new part of an evening routine to compensate for a lost feed/close time together.
It may take time for him to be ready to drop another feed, the morning one, and if you are not in a hurry, don't rush him. In my opinion, gentle weaning is the best for a child.
Well, this actually comes from a woman who hasn't weaned yet her child :wink:, so bear in mind, my advice is based on what I read and how I would do it probably :lol:.