This edit changes my answer substantially.
There's talking to your customers via press releases or other public announcements, and then there's market research. The problem with public announcements is that the feedback isn't as complete as Wizards might need to make the product better. For example, the feedback might be overly positive (hard to believe sometimes, but true) or overly negative. Also, many things Wizards might want to know before going forward on something may not be addressed by customers talking off the cuff.
As for a beta test being far to late to get feedback, I disagree wholeheartedly. First, it's always easier to get feedback on something concrete than abstract. Second, given that two people have already posted that they knew about this, it seems likely that they have gotten feedback on the program, but not from the public at large, which is the best way to go about doing things, I think.
Why? Because any statement or question from a company is going to be examined from the perspective of an announcement of a possible (or actual) product or service from potential customers. People will start forming opinions on the product immediately and possibly buying decisions. You don't want people to hate your product based on an announcement particularly when you don't have a product to point to and promote.
Many companies like Apple and Google don't announce products until they're ready to either ship, or in some kind of open beta. (Google in particular is famous for long beta testing periods.)