With due respect I want you to add some more specs of pro camera mode in upcoming update I shall be very thankful to you
make sure your firmware is up to date.
a7 is a budget phone so samsung has to cut down some specs, also to keep difference between its flagship and midrange phones. but, you can request that directly to samsung through "get help" page of this app, by clicking "send your feedback..." and writing your stuff there. this way you're just contacting other users