Since the second option you gave has a total of 5 ports, you would divide that up by cost per device/port, which comes out to $7.99 per port, vs. $8.99 for a standalone laptop charger that uses a proprietary connector and can't be used with any other device. I think the point that was made still stands that USB-C is cheaper than the old-style laptop chargers.
As to the adapter situation, I have a cheap NuVision tablet that has a micro-HDMI port, other than that, I have never owned a device that uses that port, so I would have to go buy an adapter anyways. On the other hand, USB-C and it's associated adapters have rapidly become more mainstream than any MHL connector, and they are more versatile to boot.
Back to the topic at hand, really the only improvements I can think of at the moment would be quite simple to add to V v.2 (V-2? V.2? ) are color choices such as blue and red, a Windows Hello camera on the front, and functioning GPS on the Wi-Fi version of the V.