This isn't "new" news nor does it pertain to the music industry. If Tate wants this thing to take off seriously, this site could use more professionalism.
This actually is "new" news. It had not been announced when in 2013 AD was returning, now we know it is returning in the Spring.
This site isn't here to service the music industry, it is to service the users. The fact that there is an Arrested Development forum on this site completely negates your theory. Reporting about Arrested Development, and other entertainment matters, actually does the opposite of holding back AP.net. The strength of AP.net's audience and community forums is that people have made friends here who they share in the joys/arguments/disappointments/expectations/mournings/experiences/etc. of things that interest them. When a site "takes off", it is because it is one that transcends it's original premise to become something much larger.