I appreciate the feedback. We put a lot of time, effort, and money into creating the extension with the features that it has. We hope to have the opportunity to add more features in the future, but we can't ignore the return on investment from the past.
I find it a very helpful product, we use it in our Powerstore and user registration solutions and use it extensively in our own administrative section for reports on users, sales, and support volume. Some users have also been very happy and successful with the results they are able to achieve.
I think part of the problem is that charting comes very far down the line and up the learning curve. You need to have a funcitonal web site with data to report on and a pretty firm grasp of how your data is stored in order to conceptualize the chart that you want. It takes a while before a business is ready to consider the slope of their sales and not just the bottom line.
We will continue to work on bolstering our audience and thier abilities so that charting will become a more important component and hopefully that will help make the business case for a substantial investment into improvements.