While I do love the current visual effects of weather in version 1.0. I think we all can agree weather should do a just a bit more. I don't think however the FFXI version of augmenting spell damage based on current weather is what we should aim for.
What I'm talking about is unique animal behavior, random status ailments/boost for certain monsters, and unique spawn/despawn conditions for certain types of monsters.

Like consider, fighting a mechanical monster during a thunderstorm and lightning strikes it causing it to temporarily shutdown yet also have a shock-spike effect on it as well. Or for example fighting an iron giant during a blizzard should cause it to have a permanent slow attack rate. Or fighting a sheep while it's raining gives it a natural resistance to fire damage.

But this is just a shameless suggestion as a means to eliminate the horrible forced elemental wheel where every monster is naturally weak/strong to one element. So we could have normalized damage against all monsters instead of saying, "Damn, wolves? Get the WHM out here." Also so we can get to the point where magic can also be used as a weather substitute and DoM can be capable of incapping monsters.

For instance, with the mechanical monster example above, a BLM can cast thunder combo a couple of times and cause the monster to have the same incapacitation as the thunderstorm weather would have given the monster. I know you say, "That's not fair, that would define on what a blm must cast against machines!" But I say to you, ever have to hit something when it has an active shock spikes? Annoying as hell. >.>

Mmkay, ready for the poll option!? Nah, I hate those. I just like feedback and "Your ideas are dumb, you don't even know about 2.0!" kind of talk~