This isn't a choice Bethesda gets to make. They didn't write their own animation program, they bought a license to use the Havok animation toolkit. Whether they want to share that license with us or not, they're simply not allowed to within their own terms and condition with Microsoft. I really hope they manage a breakthrough and somehow persuade Microsoft to let them share some tools to work with this engine with the modding community, but given that this engine was recently sold for $110 Million I think it's pretty likely to stay under lock and key. great so we are stuck with terrible mirrored weapons because of the stupid smg animation