Don't think so. From what the article says, the majority of game defining data will remain the same, albeit modified to fit the new schema. Frostbolt will still be the same power, etc. The changes are to the global game infrastructure and how it interprets these data, so there will be some stuff that used to work that likely won't work now (eg wall walking) and things that were possible (speed hacking, water walking) that won't be possible now.
