Blizzard isn't going to re-design an entire class just because you get bad RNG sometimes.
Warlocks success on PvP is designed around fear, we don't have a choice. They aren't going to revamp the warlock class because some retard who thinks undispelable stings is a good idea wants it to happen.
Fear pathing is here to stay, just stop posting theres nothing left to say.
Why would they have to redesign the class?
The largest complaint from warlocks about a fear > cower change is that it lessens the abilities use as a distance creator. Right now it is more effective than any other CC in the game in regards to potential distance creation. (run one way - feared target runs another). Despite the obvious offensive advantages a movement free or cower fear would create you feel the defensive loss from the ability would be too great.
If it is too great then something would need to be changed. Despite demonic portal being added to help compensate for the "train the warlock" style strat (which trust me I know all too well as a TBC hunter) you may potentially need something to help compensate for that. Maybe improved health stone would give you a 50/100% chance to remove snares when used.
That's probably a bad example but the point I'm trying to make is just because you lose some of the potential power of FEAR to create distance doesn't mean that weakness can't be off set some by changes to another talent or ability. Maybe imp fel hunter could also give your fel hunter the ability cast a 2-4 second "demonic" freedom or something.