the stock maps arent designed to make more power or drive better
they are purely stock maps to give any one that installs it a safe and conservative tune, allowing them to drive to their dyno workshop and get it tuned correctly. it may make a bit more power, who knows, does it matter? probably not.
it wont hit rich and retard as that doesn't exist
driving on the stock maps is fine, and you can do so for a few days, weeks etc, its meant to be a conservative tune to suit most cars and conditions