He should be way more agressive defending the rim,
I think the opposite is true, because he loves to block shots it often drives him out of position.
faster in switching, screening and so
See above, he is not unathletic, some of it is mental and a lot of it he is well versed in basketball and is a guy who coasted on his athletic prowess up to now.
The thing is that RW has been superhyped since summer without any reason.
Guys who can block AD's shot don't just grow on trees....
This guy is a work in progress. He is not garbage because his athletic potential is so high, if he learns some skills, look out. He is not there, right now but he still has a ton of potential because he has a lot of room to grow in terms of strength, skill development, etc.