If we talk about logic - 35yr old player is just slower and gets slower IRL usually every month as well as he gets older and older so "defence" drop we could call logic drop - of course if we talk about shooting - free throws I mean it's probably the thing which could be touched less in aging case. But anyway it's difficult situation as we can also say player is slower so thats why his jump shot gets slower as well , he can't get in good position often because he is too slow. Also we should not forget BB season is faster than IRL one so 1 month here isn't equal month IRL