I just came up with the idea to equip poor in AI aliens in a weapon of damn destruction. Their plasma fire is not so effective, however new fire sounds and glowing effects are excellent.
From Underwater I remember torpedo lunchers! This is a disaster for enemies.
Instead of throwing plasma grenades one shot and 10x10 square is burnt.
Let say one of the aliens per mission have a heavy gun like this that only UFOs can use - very advanced stuff even for UFOs. We can finally reasearch it, but at the end of the game. Like adv. weapon from Discrict 9.
I am not saying they should shoot it in every direction burning everything around, but create accurate conditions for the invasion, so everytime your comando-man wants to look behind the corner he's doing sign of the cross. I think there is still too much confidence when squad is exploring the map. Just my 5 cents