Here are my suggestions:

I would like to be  able to use more than one gift certificate at a time.  So there should be more than one box in order to enter gift certificate numbers.

Render rewards should not be a "gift certificate", they should be considered something else so that we can use a gift certificate in addition to the render rewards.

I would like to be able to sort my Wish List by "Sale" so that the sale items appear at the top.

I would also like the Account page to default to the itemized history instead of the order history.

When looking at the itemized order history, I would like to be able to click a link to get to the product page so that if I have to redownload the item I can see what it is that I'm redownloading.

Please get rid of the clearance section!  Just because an item isn't selling like hotcakes, doesn't mean the item has no further value to someone. It's a shame that items are being pushed out of the marketplace into clearance and then into oblivion and are lost to those who may come along looking for such an item and now can't find it because it's been deemed useless and taken out of the store.

I would like to see an annual 50% off sale similar to what RDNA has.  That would be 50% off of select items with no minimum purchase required.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi