I think we will all have to have realistic expectations of the Pro version. Coffeecup is only a relatively small business and its developers have to work on a wide variety of programs. Cart Creator is just one of many excellent programs they have for sale. As someone that has extensive experience of coding programs, I know just how long it can take to make even the simplest of additions, to aid the functionality of a program.
The pro version needs to be a quantum leap from the basic version, but it also needs to keep a reference on its placement in the ecommerce marketplace. At the moment Coffeecup products are sold on their ease of use and the speed at which they can be deployed. If the pro version became overburdened with features and difficult to use, it would lose that unique placement and just become another difficult to use product, lost in a sea of ecommerce solutions. Likewise if all those extra features ramped up the retail price too much, people would seek out other alternatives.
I currently use powerful ecommerce software on my two main sites, whose existing feature set is way in advance of what anyone has requested of the pro version of Cart Creator. With a plethora of add ons, I don't think that there is anything it isn't capable of. With that level of complexity however comes a price. A mysql database that has to be implemented, maintained, upgraded, backed up and periodically cleaned of the crud that builds up on it. An admin system that has hundreds of user definable functions, but a learning curve that takes months. A complexity of use that can even overwhelm the user of the site. Check out with account, create new account, check out without account, check out with PayPal. (It took hours of hand coding to remove all that garbage).
The future pro version of cart creator will have to perform quite some balancing act. It needs to remain relatively simple to use, yet have an advanced feature set that will appeal to a broad market span. I personally won't be in the market to purchase till its loses the primitive shipping options, others will perhaps not buy until it allows digital downloads, or has inventory control etc.
Scott and the team are going to have to make some difficult decisions over the next few weeks.