I love that cannon, it's like a more accurate-energy weapon version of the missile launcher.
Not no more, it's a sort-of-trail-rifle-I-guess (not played a Guns character). It's still okay, but... just not quite useful enough in medium-range combat with the huge chunk of screen it blocks out, and the cumbersome draw/reload.
Naw, the holorifle is not my taste. I want a rifle with the same "tesla" effect of the cannon, and same aftershock, and maybe some cool tesla disintegration.