ESO could be further simplified by eliminating Stamina and Magicka by combining them into 1 simple 'Power Bar'. The stamina distinction of block, sprint, dodge roll, etc should no longer unfairly favor 'stamina' over magicka as a resource since many other elements of the system no longer respect a clear distinction between these two resources.
The further we get into hybridization, the less it makes sense to have separate mag and stam.
Because things like wards and barriers exist in this universe. Multiple Skills have the words in their names, multiple spells throughout the franchise focus around those abilities. Blocking consuming Magicka can 1000% be taken to mean you're channeling Magicka into whatever you're blocking with to reinforce it and essentially make it like a ward.
I think it's weird that blocking can cost magicka if we want instead of stamina, but here we are.