I don't really expect they will every provide something like that. That really is a diagnostic tool and they have been very clear they are focused on creating the best Home Automation hub available. I hope they continue to stay focused on creating great automation features. Mainstream consumers really wouldn't understand what they were looking at anyway.
I wouldn't expect a home router manufacturer to build a network analyzer into their routers either. Just too much development effort for an audience that largely wouldn't use it because they didn't know what to do with the information.
If you're really interested in what your Zigbee network is doing, an XBee is the way to go. It's around $55 US for everything you need.
