- Brother Lame
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- Exalted Heroic Member
"Don't touch that. We don't know where you've been."
I don't believe you can submit them as such, at least not on the public forums, but you can join one of the Screenshot based custom content groups on Bungie.net.
Make a post in one of those (very important you don't do it in here, or outside of a private group), and the members should comment and give you their opinions. Some groups have some very experienced members, who you may be able to ask for advice on improvement.
Hope that helps. :)