If your wingspan is 72" from the tip of one middle finger to the other, then you're really closer to 29" than 28" as far as DL. I find that a swing of 1/2" either way is enough. 1.5" plus/minus is too extreme in my humble opinion.
By and large, most folks tend to anchor with their wrist just under the ear lobe when using wrist releases. However, this is just a general rule. As long as you can consistently anchor with good form and a stable stance, you'll be fine.
The others above also posted great suggestions. That peep sight is very fickle and I would change it out to a standard ring sight if possible. Your left hand, at least in your picture angle looks really close to the string stop. Like nfh said, put a little bend in your arm and that should fix it.
Other points - definitely loosen your grip as others stated. At full draw, your left palm is all you need for stability. There's so much force and weight imposed on it that all you need your fingers to do is just gently rest on the grip or keep it open (whichever is comfortable for you). Be careful if your arrows are cut short. You don't want your fingers in the way.
That wrist strap on your left hand appears to be tight. It should not be used for stability when drawing/shooting as it may cause you to cant the bow.
Also, before adjusting your draw length, try shortening your wrist release. You should be able to adjust it so that when you hold your palms up, the 'claw' should be sitting inside your palm versus extending out to your fingers. At full draw, your trigger finger should be sitting on the trigger with a slight bend, similar to the position of your finger on a firearm trigger.
What is the length and spine of your arrows? Also, what is the weight of your inserts and tip/broadhead?
Good Lord, this is a lengthy post. I'm sorry. There's just so many variables to consider that I just wanted to lay it all out there. By no means do I consider myself an authority. I'm just passionate about the subject.
Good luck! Archery is a fun hobby