None of those changes are worth fighting with over IMO, or are significant. Cross faction communication through bnet seems like it may be important too, but I'm sure they will at wow classic gold least eliminate the right-click to grow FL for reverse faction players.
Blizzard's stated plans around content launch (a staggered content launch program with fewer content stains than classic that retains 1.12 talents for many release periods, and potentially keeps 1.12 itemization for all release intervals ) will alter the way WoW grey plays more significantly IMO. MC will be a great deal easier, and the comparative power of and item priority for specs will be quite different than vanilla, except after the last content limitation.
I am in favour of no changes (within reason), however I believe you just have to be happy that we're getting a largely unchanged model of vanilla with innovative content launch. A few small changes from using the 7.3.5 motor and mainly sticking into the 1.12 client gameplay wise are minor concessions to cheap wow classic gold create for an official vanilla client within a reasonable period.