I don't quite think that they should do it to all creatures. If they do, what are the people that solo more than anything going to do? I really don't want to go back to how it was like on FFXI, where soloing was possible, but a slow and hard process. I think that they should raise the HP on certain monsters or introduce new monsters to the world that are adjusted to parties. Because I do think that we need to be able to fight creatures in a party that aren't killed in less than a couple of minutes. But, I also want to have the ability to solo without it being extremely dificult.

I completely agree with elemental resistance and weakness. Definitely think that this is something that needs to be enhanced.