Allow changing of shipping, coupon, and maybe other options, per product
Currently there is only a single global setting for a number of fields. The two that stand out for me are the Shipping Address checkbox, and the option for a discount code. Since I sell some physical products and some services, and because some have discounts and others do not, it would be best to allow specifying those two fields on a per-product basis i.e. be able to override the global default.