Use for cross-faction Resources

Hi all:

Forgive me if this is already mentioned.  I would love to be able to either "convert" cross-faction resources (like troll lairs, etc.) into usable goods, or permanently scavenge them to get them the heck out of my way.  I know in WoM that there was the sandstorm (I believe) spell that would destroy a resource or tile in the world.  That was all well and good, but I would expect to either be able to (as Empire) convert cross-faction lairs into something like Butchermen lairs (or similar golem-esque/undead factories), and maybe have Kingdoms be able to scavenge materials/gildar from cross-faction lairs.

I do understand the balance issue of rushing out with pioneers to outpost+destroy opposite faction resources, so perhaps they could be put to use as "mines" (minor gildar+materials... mayhap a % to grant some bonus stuff or something) to prevent a player from "cleaning" the map of enemy resources.

In any event, it was just a thought.  I played a few games last evening (just testing early game stuff: <75 turns), and kept getting started with a variety of different faction stuff in my immediate vicinity.

Anyway, that's really it for right now.  Thanks!

Dav