I'm certainly opposed to any suggestion that heatsink is useless and should be disposed of for something with more universal cookie-cutter appeal - which appears to be Moriarty's shout (and yours Sunderland?). There should be weaker and stronger tools, some that only work with one or two weapons and some that work with all. Perhaps even some that until you really think about it don't appear to work at all, or only work synergistically with other crew members tool choices. More tools and greater diversity of tools encourages experimentation.
Universal cookie-cutter appeal : Is it fashionable to have obviously broken things taking up space or something? Tools need to be functional, and competitive with the other tools otherwise they never get chosen for the job.
Lets run through some of the ammunition in question:
Heatsink Flare Gun use excluded, Heatsink is
uselessas things stand - Though i remember the days when it was quite useful - all I'm saying is atm it sucks, and taking it is a mistake...and you should feel bad.
Incendiary Same story - though you shouldn't feel bad for taking it, after all you've already decided your not playing to win - and all the power to you!
Greased You me and everyone else wants it to work, especially for the light mortar...only you never really need it and it comes off kinda gimmicky - but man it's fun to fire.
Now I believe eventually Muse (awkm) will get around to giving each ammo a useful roll -
its just that atm there is no reason to take any of the abovementioned ammo.