IPv6 has a huge amount of bloat created by guys in cargo shorts and pony tails being flown out to exotic locales 3x a year for IETF conferences to argue about minutia and try to get their name on some IPv6 spec document. All they needed to do was add a couple more dots onto IPv4 and maybe switch to hex.
Wasn't it from academics in their ivory towers? That's kind of the opposite of flying out to exotic locales.
Of course, back here in the real world you can look at the RFCs yourself and see that they're credited to places like Ipsilon Networks, Xerox and Sun Microsystems. Boring corporate network companies.
Nah, the details in the spec all have good reasons, but it's based on the original mistake of making it an entirely separate network from v4 with new address blocks.