I think the implementation of radio is not user-friendly. Just try execute some command with shortcut ctrl+9 with one hand. Another problem is that you can't select Hand of Nod and Barrack from command list. I also have problem to memorize the most of commands. There should exist more intuitive system, maybe shorcuts like for buying vehicle and characters. For example ctrl(open menu) -> 4 (Defence...) -> 3 Refinery. Or system like in Battlefield (https://vignette.wikia.nocookie.net/battlefield/images/4/47/BF2142_CR.png/revision/latest?cb=20110724171131). Also command should be more exposed on screen (again look list of command in bf).