I've posted about this in a few places, but I'll try to make one definitive answer here. If you all can help me point your fellow NCs to this thread, I'd appreciate it. Sometimes Creators is so busy that folks don't see our responses.
Why didn't Ning launch the Ning Design Studio with profile customization enabled?
Getting profile customization to work with the Design Studio is a good chunk of work. It might seem like we removed a feature, but there was no way we could just re-use the old profile customization experience. We have to rebuild it from scratch. Because there's a good amount of work involved in this, we asked ourselves the question: Should we hold off on launching the Design Studio until we have profile customizations? We answered "No" to this question because plenty of NCs don't have this feature enabled, or don't mind removing it. Therefore, we wanted to make the Design Studio available sooner rather than later.
Will members be able to customize their profile pages? If so, how much?
Yes! Since we're rebuilding the feature, we're going to look at it from a fresh perspective. There were lots of issues with the old profile page customization experience that we'd like to fix if we can — for example, resetting customized profiles, controlling how much members can customize, etc. We're still finalizing exactly what to do. I've heard loud and clear from some NCs that they love how their members can go totally wild with their profile pages. I've also heard — maybe less loud, but just as clear — that many NCs want a controlled profile customization experience. We're also getting some data about how networks use profile page customization, to help prioritize and guide our plans.
When you take a step back and reflect on the Ning Design Studio, as well as the Instant Ad Boxes, this was a monumental release. While we totally hear that folks want profile customization and want it now, there are a number of other next steps we need to consider and prioritize (for example, better Color Pickers with transparency options, a new Features Layout experience that is integrated with the Design Studio, Premium Themes, etc.) Most importantly, we want to make sure that everything is running 100% smoothly and we are responding to your questions about the Ning Design Studio in the Help Center.
So the short answer is, we don't know when, and we appreciate your patience :) As much as I want everyone using and loving the Ning Design Studio, it's opt-in for a reason, and fact is that some folks will just prefer keeping things exactly the way they are.