Which part of modern ARM do you feel is getting too complex? And what is there to gain by making an ISA more understandable to humans? Educational ISAs already

Which part of modern ARM do you feel is getting too complex? And what is there to gain by making an ISA more understandable to humans? Educational ISAs already exist for learning. The complexity of even something like x86 is not a real obstacle for people who actually need to interact with it.