Rpi design is as old as RPi. Nothing much changed since first release. It's very simple to support such device and since the user base is large, you actually don't need to do anything at all. Everything what needs to be done, was already done ... years ago. You only need to release yet another and another board version of the same board. Now RPi has got even an on board wireless module. And there is only one single wireless chip. How boring
PC2 is a new device, which is not suited for people that come from a toy called Raspberry Pi. Of course it's not yet very well supported since it's a new toy for developers too.