Sadly I doubt they are going to change their mind, it's very rare Blizzard will ever do a 180 on something even if they realise they are wrong, that usually forces them to dig in more. The only times I recall them ever doing a U turn because of major flashback are WoD flying (biggest riot in the games history) and RealID names, and the second one was more a case of they discovered it was unlawful in Europe and they couldn't justify only doing it to the US.
One saving grace is that with the big changes coming in Legion the will be a number of ways to spec a Fury/Arms warrior, and with rend optional and HS available it should be possible to make one of them play lie Gladiator. Sadly that doesn't make up for the loss of the S&B fantasy
My current progression style in mythic HFC is to use Gladiator on all the bosses we are either learning or farming, but use Arms on bosses we are close to killing for that extra bit of execute. Because it doesn't really matter if you use Gladiator/Fury for learning bosses and arms sucks on farm bosses.