I seriously doubt that any change in notation would be beneficial enough to be worth the 10 years of work, incompatibilities and bugs.
You don’t see people making this kind of fuss about MAC addresses; that’s because people know that they aren’t supposed to memorize them, and we treat them accordingly. That’s the thing about IPv6 - you have to realize that you have to let go of the notion of memorizing IP addresses, just as it would never occur to you to know your MAC address by heart. Use the DNS; eliminating the need to memorize IP addresses is what the DNS is meant for.