This, by far, is my favorite Bruce/Alfred dynamic. Overall, it just feels more 'real', alive and natural than past portrayals of their relationship.
I agree, I love the dynamic as well, I also really appreciated the dynamic between Bale's Bruce and Caine's Alfred. Any other incarnation outside of the comics just hasn't felt authentic to me.
I love seeing an Alfred who is hands on, gets involved, working on Bruce's gadgets, patching him up, being his home base that he communicates with on missions. I think there's a lot that BvS gets right, that they don't get credit for.
My one very small critique is the age difference. If we were going by the actors, Alfred is 68 and Bruce is 44, meaning Alfred was 24 when Bruce was born, and presumably had a close relationship with Thomas Wayne beforehand for a long enough period that Wayne trusted Alfred to be Bruce's caretaker in the event of their deaths, not to mention there's the implication Alfred had some experience in the theater and you would think the military and medical training as well. Just kinda weird that Alfred would be in that position of butler, caretaker, and Bruce's godfather at age 24, and how long had he known Thomas Wayne before that? By contrast, Caine's Alfred would have been 41 when Bruce was born, which fits the role much better.
Very minor nitpick though, and it's not implausible, and much different than any incarnation of the character before. You'd think Alfred would be at least Thomas Wayne's age, if not, older. They could also just add some years to Alfred's character, say he's mid to late 70's, which would at least put him in his 30's when he became Bruce's parent. Im thinking too much about it, I know. Minor nitpick that's worth it for the great casting.