I've implemented the shopping cart and have found that the way that this has been written does not really allow many changes to the code if you want a smooth upgrade path.

The way it has been written doesn't allow for much extension to say the order object in an easy way for instance or any extra controls on shipping other than having it fixed cost.

I've managed to keep the code changes in the Kentico files as small as possible by using user controls and new class libraries and calling these. It would have been easier to inherit the Kentico Shopping Cart controls and add new methods or steps as needed or have override methods.

I've noticed that there are some duplications in the code where a user control is used on the cmsdesk side and public side (commercecart.ascx etc.).

Is there any future development being done on this to isolate the code somehow to allow for an easier upgrade path?