The rotations of dragoons have changed a lot, but the class still plays similarly, it doesn't feel like a completely different class, and the additions were a logical addition to 2.0 dragoon.
Black mage seems the same.
I don't think punishing other players by doing less damage is the right answer, I'll be levelling bard to 60 because it will always be my main but will be doing the harder content as scholar.
The best thing to do is to voice your opinion on the forums, as annoying as it can be to see .
Don't be rude to others on the forums either, even though it can be tempting with some of the things they say which shows they are not even trying to understand the issue.
Keep voicing your opinion to let S-E how serious of an issue this is