Bethsada only owns the ESP plug.
They cannot claim the assets that the author created outside of the Creation Kit tools.
Cant see how much more obvious I can make that. Can they claim ownership of stuff made in 3DSMax don't think so, they don't even own Adobe. Can they claim stuff made in any other program, how is it that people arrive at that conclusion even???
However once it is Bethsada.net that holds the mod's they may be able to claim the entire modification as their property and could go as far as creating TOS agreements to substantiate that claim, if they would like too anyway.
Therefore there will be issues with asset sources mod authors have used before. In the past Mod Authors were able to aquire free to use assets from a few sources as long as the product was not sold for money. People that have claim over assets like that wont want their stuff on a game like Fallout 4 however due to the fact that the question of ownership is now in the air. There is also the question of who makes money on that and it still needs to be addressed.
Either way, the modifcations like Texture packs will most likely have to be entirely made from scratch.
If your in possession of such skills and programs like myself than your really not being intelligent to give that away. The worlds fastest growth industry is software. If you have 5,000 textures that are 3D game worthy your sitting on assets that are potentially worth a lot of money as it is right now in todays market.
One of the things that really bothers me about todays people is the prevailing ideas that the only way to produce an income is to go to work for a company...? Really the whole concept of that puts a frightening image in my mind about the capacity of the upcoming generations. There is no need to work for someone else to create a meaningful income and even then how did that someone else become the boss...? The idea it just doesn't sit well with me how is it that people in todays world assume that even an education is a requirement?
You don't need an education or to go to work for someone else to develop a money making idea or a business and in fact many of the worlds most successful don't have the stamp of approval of some college or university so no idea's here on why young people have that drilled into their heads.
I've also no idea where or why people think its the job of the government or companies to ensure their wellbeing other than it must be that its different based on where you are in the world. Mainly though there is a total lack of the idea out there that well being is entirely up to the individual and not some other entity and this lack of knowledge is surprising to me.
Anyway
There are currently many outlets to produce modifications, applications, and software in todays world for profit with no need to go to work for someone else or some schools stamp of approval and no certifications required so really how come people are just soo, helpless?
If Beth or any other game company wants to approach the whole thing as business per usual hey I'm fine with that as long as people realize that there are plenty of ways to skin the cat than fine. Hopefully your going to realize that the growing number of opportunities in todays world other than Bethsada are quite promising enterprises.