You have to make it look presentable, good-looking since the start. And, by reading your comment, it goes something like this?: A customer writes to you, and you tell him - if you want, I can make some changes (and you say what changes, that he will definitely take) ?
Point is: if you see yourself etc. that something can be done about it that would look better - do it. Also, since it's a photo, you still have to think about 'how it would look like coded'. If you don't code it, then when a coder takes it, he will make it just like it looks like in the PSD - he won't start changing things to make it better.