See my first couple of posts in response to Faith’s first question.
These are imperfections not illnesses–they do not kill the person. Most cures are of deadly illnesses, such as those attested to at Lourdes. All of us have imperfections, but most of these imperfections aren’t as recognizable as others. I’ll take myself as an example. I’m quite petite–under 5’ tall. In the world we live in I can have some difficulties dealing with things like driving (most cars are not designed for small persons), getting things down off grocery shelves, opening commercial doors (some are quite heavy for me). Should I beg God to make me taller? Especially since being taller would make my weight less of a problem, as well?

Hardly. I may have imperfections, but I am perfectly loved. As are my nephews with MD, even though they are very limited in mobility and even in movement. It is how we treat people who have such limitations that is important in our fallen world, not the limitations themselves that matter. Such limitations remind us that we are to love one another as we are, not as we’d like to think of ourselves. When we are resurrected we’ll have perfect bodies–I may still be petite, but I’ll be perfected in love and that’s all that matters.