Dear bharatB ,
4. We can't fix it right now.
5. In next Cred and Types release we will remove MyZebra forms, it's will alow users have more ways customize fields. For now, you can set height/width using CSS with !important attribute.
6. Looks like it edit page link, not edit form.
Please let me know if you are satisfied with my answer and if I can help you with any other questions you might have.
Regards,
Gen.