I think all you have to do is look around at how old most forum posting from Upverter people are. Then look at how many say a feature is just about ready to be released. Then notice that it's been 2 years or so, and the feature doesn't exist. This is particularly maddening when you're reading about a feature that used to exist and is maybe even mentioned in tutorial videos and help, but the feature has been taken out to "make things better" or "to be replaced with something much better".
In other words, Upverter looks a lot like it's on autopilot. The service is pretty nice, but I would not count on seeing anything you don't already see. Maybe Altium is going to make some investment; maybe not. I don't count on it.
I'm not trying to be negative on purpose. I just think it should be clear what the situation is or at least seems to be.