I am not sure if the one piece armour of Fallout was a choice due to the blood and Gore piecemental dismembering of the game , but I see no reason why this eventual dismembering couln't be used as well in Oblivion with piecemental armour with a bit of extra work .... just check for example the cryengie procedural destruction ... working with the cryengine I seen how to make this pieces ....
actually the way dismemberment is set up in fallout doesn't have anything to do with having one piece outfits. The way bethesda do dismemberment currently is fully compatible with outfits that are made in many parts. For example many outfits I have made are already made of many parts, the dismemberment is done on a per nif basis, basically you can set have gloves.nifs contain the correct info to attach to the correct bone set. and same for all outfit items... boots, greaves, whatever.
Crysis, depending on what you refer to, prefabricated meshes are setup to be destroyed. I think you can say trees are have procedural destruction, and as i understand it other things can also be set up to do it, but you need a to specify a 'cap' mesh that will cap the hole in the mesh when its been broken, which is the limitation, a complex shaped object is not going to be easily capped
statics like shacks are not procedural, they are usually set up in a special way to allow them to be destroyed.
Fallout has destructible environments too. granted it's simply replacing one broken mesh with the original one. And deffo not as cool as how crysis can set it up.