While i haven't read all 25 pages of this thread i haven't seen one person that has made a point regarding the new AP tokens.
Blizzard has specifically stated that current AP tokens will no longer be usable on 7.2 weapons. This would imply that there will be new tokens which could potentially give a higher amount of base AP. The math the OP used was off of 400 AP per token which is the base right now. If that number is different this entire argument would be different.
We don't even have a release date for 7.2 and we don't even have 5 guilds that have cleared mythic NH. I think we should all give some time for some more details to come out. In the meantime i'm pretty positive 99.9% of this thread hasn't even looked at mythic Gul'dan.