isn't the dicsussion here really:
"If you want to use /64 go ahead, if you want to use /121 go for it,
if you want to use SLAAC you'll get a /64 and like it"
with which i do not have a probem.
and i even use slaac at home where things such as address control,
reverse dns, etc. do not matter and are not worth the effort.
randy