Agreed.
My 5/4 Isurus is definitely a quality suit but I have had issues with flushing in heavy surf. However, my biggest nuisance is that the lining is pretty sticky so it's a bit of chore for me to take off (I've got a terrible shoulder, torn bicep tendon/torn labrum etc).
The Feral isn't perfect but I find that it flushes less, is warmer, similarly flexible, cheaper, and dries significantly faster. I prefer it to all of the other winter suits I've had. That said, I haven't been in an Oneil or Ripcurl for 4-5 years.
YMMV but I made the swap from Isurus to Feral last year and I'm pretty happy about it.
My winter setup is:
6/5/4 Feral hooded
8mm Solite boots ( I like but not as awesome as the adds make them sound)
5mm lobster claws (currently old Rip Curls, need to update, seems are blown)