Good players adapt. Yes, it was easy to do damage in MoP but good and average warlocks could still be differentiated from easily. While managing procs/snapshotting was really irritating to deal with, it was huge for determining which lock did more damage.
On topic: I think Soul Swap is only worth it if you have 3/4 shards if you have extended dots (dots last up to 130% of the original duration now instead of 150%). This changes at 100 though fortunately! I think we'll have a lot more Soul Swap usage then. Right now, it kinda sucks.
Remember the 2 set bonus at 100 (http://www.wowhead.com/itemset=-1115):
2 pieces Affliction: Getting stunned, silenced, interrupted, or feared generates 1 Soul Shard. Can only occur once every 15 sec.
Set bonus speaks for itself. We'll have a lot more shards to use. SB:SS might even be used every now and then at 4 shards.
side note: does Haunt still refund a soul shard on dispel?
yes you remembered correctly. Probably every post I made about mop was negative and rightfully so. I hoped it would change, but history has shown that it did not. MOP was horrendous and what they did to locks was just asinine.
You are right though that good players adapt. The issue is do you want to play a class that is utterly stupid now? I for one didn't. I lost all desire to play. I had no inclination to play anything other than rogue lock in 2s which I actually enjoyed because it has always been fun to me even with mop lock mechanics.
If you liked mop, so be it. I just don't understand how anyone could enjoy warlock game play in mop. I play to have fun and thus mop didn't do it for me.
haunt doesn't refund a shard on beta. and on beta, you are out or low on shards pretty much all the time.