Warrior changes are unwelcome.

[Skos]

Reddit already did the calculations. These changes result in roughly a 5% decrease in their overall damage.

Which was only raw potency coupled with the Storm's Eye nerf.

It did not take into account that the new Inner Release compared to Berserk is a ~86% damage increase compared to the 30% it is now. On the other hand, you could still crit/direct hit under old Berserk. It's very complicated math but the damage seems to be smoothed out instead of relying on crits/direct hits.
It also does not take into account the amount of beast gauge you'd previously save for Berserk is now free to use, which gives you ~2 extra Fell Cleaves a minute.
It also doesn't take into account how you don't have to save Infuriate for your Berserk anymore, meaning you're now free to use it on CD to get you extra Cleaves.

It's too early to tell whether or not these changes are an effective nerf to DPS or not. The math is too complicated and will likely not be done before 4.2 releases, at which point it's easier to just hop onto a dummy and test the changes directly. Most math wizards stopped bothering.

The way I see it, people are overreacting. A lot. As usual with changes like these. People freaked out over SMN changes and it ended up fine.
From my perspective and from the math that I've seen so far, DPS will be roughly the same with the possibility of it being slightly lower or slightly higher than before. I'll be following the math very closely though because these things are interesting to me.
Heck, people's math is suggesting that it might actually be a DPS increase to hop into Defiance every 90s to hit Unchained because it uberboosts Upheaval, and the potency lost from Deliverance autos/gcds is outweighed by the damage you get from boosting that Upheaval and sitting in Defiance for 10s. A very interesting concept to be honest.

What has changed though is that Warrior's rotation will definitely be braindead easy in 4.2.

They smoothed out Warrior's damage, since in 4.2 you will no longer be praying your Fell Cleaves crit/direct hit because they were ~30% of your damage output and not critting them feels bad, in exchange for making Warrior far, far easier.
And for some people easier means less interesting.