I know, let's look at COBL.
It started late, but recently we see a lot of mods being COBLized so that they can use common assets, and reduce conflicts and the like.
If one common library starts from the beginning, it should be pretty much a standard after a while and used through out a large part of community, and it would be a one time download for lots of the mods.
And it would be make by community itself and pretty much listen to the community's needs and requests, in contrary of what we expect from the developers.
When I was playing Oblivion, I used around 50 mods. None of them, nor the 10GB of mods I had downloaded, used any duplicate resources. Anything that may have been duplicate was overwritten, meaning that the mods pulled from the same locations. But I never had 2 of MyCoockieYumm.nif in more then one location.
I tried one mod that used COBL and spent hours trying to delete it and all the COBL stuff.
Like I said, the idea is honest and good, but in practicality, trying to standardize mods will not work. As an option, sure, Im all for options, but a requirement, the only ones I want to deal with are any DLCs.
If we limit ourselves to one single set of resources, you are stunting creativity. I make my own models and resources, and I am not about to let them get packed in with an asset master file. Did that once before and the whole thing was hell to deal with.