I might be over reacting your right, maybe I am a bit bitter about the changes, just found it a touch insulting they want to bring up the fact that I get upgrades 75% but ignore that I am buying my tickets in Y,B,M depending on what the cheapest category a upgrade is available in. the 13% represents that time that business Z is available and cheaper then going into M.
I fly quite often from Thailand to the USA and have some date flexibility and always have used my system wide upgrades (y,b,m, only), miles, or Z class. I selected my benefits before the global upgrades program rolled out The remaining 12% is for the rare time one of those classes were not available or a random domestic flight when I was back in the states to see family.

Hope you are right about going back later when they realize they lose enough customers like myself I guess.
Thanks