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I find the current way sufficient...

you can either copy / paste into an email

or

you can go to the photos app, go into selection mode, select the photos you wish to email, then just click "email"

its that simple....don't see where they could even add a button to add photos when composing an email anyway.....

besides, when copy / pasting you have control of exactly where the photos go. Instead of just at the end, if you wanted it between paragraphs for instance
 
2010 and we can't attach a photo to an email? We are stuck with starting in the camera roll first? Unbelievable.

It's all give and take. You just have to go to the camera roll, select the pic and then email it. Drafting a email and want to attach a photo? Gotta back out and copy and paste it.
 
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