Hi,
please note that described functionalities (channel selection) is available with 1.4 code. If you go to Inventory, and click gear icon (upper right corrner), you can manually set channel widht, and list of available channels thant can be used.
Regarding band selection per SSID this is also available, as explained in other post.
As for management mode, this is clearly explained in product guides. Local management is not an option, but also please note that functionallity of devices is not under risk if Internet service is down (you cannot change configuration, but devices will continue to work).
Please take into considiration that ability to remotely manage WiFi infrastructure (on multiple sites), without suscription license is not an option with many other products.