the giant enemy crabs and the maser cannon looks awesome and im really excited to read the M97 operator's manual, but i think the team logic is the news that fires up my imagination the most! i can see a mission where the coup forces are trying to hold back waves of mutants and you get to choose which threat to prioritise and use as a distraction against the other lol... as for weapon ideas i have:
75mm airburst cannon - slower rate of fire than the regular scattergun but faster than the 120mm, with the shells exploding where the cursor was at the time of firing, poor penetration but good for crowd control
tangler gun - repurposed martian animal control, fires adhesive webbing with very low damage and negligible penetration but same rate of fire as a standard autocannon or scattergun, works best to delay swarms of organics for safer plasma slashes but can also impede enemy mechs
electromagnetic coil mortar - a slower firing alternative indirect fire option to the metalstorm, larger blast but way lower ammo capacity and the range is determined by railgun style charge-up, pair with spider drones for the ultimate sneaky stealth shenanigans