I cannot afford a new controller at this moment in time..unemployment /disabilty and other "excuses" limit my cash-flow.. my old joystick still has its uses.
SCB and Chaff can be either from a controller/fire group or the keyboard. I see no problem with having missiles the same, either from controller or keyboard.
I am 100% not getting into this as a debate again. Well not a debate as much as an assertion because it's not up for debate and never has been.
The words which directly came from FDs developers were to the effect of, if not word for word, "this is how we have planned it. It doesn't matter if you like it". Too much of the UI, too much of the game, and too much sense has already been built around a two trigger system.
If you want to know why it makes so much sense I will suggest you go look at past "discussions" on it, which have had some of the utterly rare moments that FD staff refuse to be ambiguous on the topic. This is very simply how it is and how it will stay. For good reasons. One of the reasons being that it's completely usable for any hardware setup, where having a third trigger would be disadvantageous to people that can't utilise three triggers properly - your point on your setup is moot, and you can just as easily bind a "change firegroups" button as you can a third fire button. You don't even need more than one firegroup change button unless you have four or more types of weapon to bind. On the other hand, want to explain how another trigger button will work with already cramped console controllers?*
*Please don't. This topic is akin to a horse beaten to the point of resembling bolognese sauce.