There are many ways of performing a smile design ,and its not only teeth, also muscles, gums, face design, and smile design can achieve those goals you are asking ,shape, size and color can be change.
You need to have a esthetic work up to determine the outcome you can obtain with veneers, form the picture it seems you still have the primary canines, that kept their place and the permanent canines took the place of the laterals, what is tricky in this cases is the tooth proportion, usually...
No is the answer. Some patients who have had premolar extractions seem to think that their face has sunk in. It is true there will be some shrinkage at the extraction site, but that will not affect you facial profile and features. You have braces on and they can help straighten the teeth, lift...