Yeah, I thought they knew. Here's what I thought might've been on their list

1. You get a single IPv6 per instance (as opposed to a CIDR range).

2. You still have to deal with IPv4 CIDR ranges

3. ...which means you have to deal with all the overlaps still :(

IMO I would love it if my ec2 instances were IPv6 only, and then use public IPv4 addresses or dual stack loadbalancers as necessary for public ingress.