There is no reason why cluster, handgun, drill, prod and mortar shouldn't be added. They're all weak enough that a newbie will gain no advantage from spamming them. And also take some skill to use effectively.
Girders and Freeze add great strategical value to the game, as well as somewhat diminish telecowing.
Other relatively weak weapons such as skunk, suicide bomber, dragon ball, Uzi, longbow, battle axe and kamikaze could be added too although the impact they would have on gameplay would be far greater due to poison and the huge anti darksiding potential of kamikaze. 1x-2x mole could be added too for that same purpose.
Hotkeys wouldn't be a serious problem seeing as most of those don''t interfere with the weapon hierarchy. There is no need to have only one weapon per row either, not in 2014 when many players can easily press half a dozen buttons within a single second.
Hysteria doesn't necessarily have to be designed around brevity, it's about making the most of your little time, and if you're skilled enough to select Jetpack + LG, cluster 2 second MAX Bounce all in one turn then so be it.
