I think we all see the magnitude of the problem here. SHIVs are too light, actual super-heavy vehicles aren't going to fit on the Skyranger, and MECs still have squishy parts.
Gentlemen, we need a new class of weapon, a missing link, a metal gear to bridge the gap between infantry and artillery. And with us using their fancy toys, those xeno scum will regret ever setting foot upon the pale blue dot.
...someone write this fanfic. Or draw fanart
For some reason I fail to imagine X-Com fielding Metal Gear. All I can imagine is Metal Slug...
LMG = HEAVY MASHEEN GUN
Rocket Launcher = RAWKET LAWN CHAIR
Shotgun = SHAWTGUN
Blaster Bomb = ENEMY CHASER
And so on and so forth...