No, the Hot Lab researches in OP1.5 were few and far between - in OP2, and probably in OP3, the Adv Lab researches are key. It wouldn't be fun if they just randomly kept exploding - think if they did that when you're trying to out-rush someone, and there you are, having to rebuild your Advanced Lab because it exploded in the middle of researching Mobile Weapons Platform, while the enemy's just finished researching their own Lynxs. You my friend are COOKED.
I can see sandstorms on Cythera - it's supposed to be Venus-like, so why not? It makes sense for the story. Just find a way to implement them into the game. Maybe it slows units down, and perhaps incurs minor damage on unarmored vehicles, and if one came at night, it would reduce the range of their lights.
One thing that bugged me about OP2 disasters - they're so localized! Since when does a thunderstorm cover 50 square yards?? I'm thinking that certain disasters - electrical storms, sandstorms - might affect the entire map, or almost all of it, not just a small portion. Perhaps there could be small caves like the one in the terrain demo, that offer shelter from things like sandstorms and thunderstorms.