If you prepare a project for a customer, you want to give him a list of extensions.
So it would be great if the extension store would have the possibility to have stored lists of extensions which can be shared by URL.
Of course this feature can be improved further if you can define alternatives e.g. let the customer choose between two possible payment plugins (mark them as alternatives).
The overview of the monthly costs for all plugins in that list would be great and of course a "add all to cart" functionality.