As a matter of fact,I believe making the draw longer would be a mistake.Your problem is form,not draw length.
In the second pic,you are letting the front shoulder come up.That shoulder must load back,not up.
ALOT can be changed with form.
Check out these pictures of me with the EXACT same setup.The draw length looks different butmy form is the only thing to change.
AND,for the record,I shoot WAY better with the second pic form.
ANd the previously posted picture.