Because he seems to be improving in some ways at least, it does seem as though there is a chance of recovery. Are you in a place where you can get a product called "KMR?" (It stands for "kitten milk replacer," and it is made by PetAg, I think.) If this were my kitten, I would give him KMR rather than just glucose water. Or, I'd give him broth (such as, chicken broth) or anything with a milk base, but perhaps not cow's milk. (Cats tolerate goat's milk better than cow's milk, for example.) The vet should be able to advise you on what you can try to feed the kitten.