The people saying that Warlocks here are better scripted than "any other private server" (read: Nostalrius) are either not playing a Warlock or are outright lying.
-Defensive stance will force your pet to continue attacking any mob you have a DoT on, when telling it to follow is supposed to pull it off (for instance, when a mob gets tagged before your DoT has a chance to do damage he will still attack it until you put him on passive)
-Fear breaks far too easily; this seems to be a persistent issue that "just report it to the bugtracker" hasn't fixed in over a year. I understand that the original Fear formula is lost to us, but this should be a relatively simple matter of adjusting the chance to break on damage (it currently feels like every single time the mob takes damage is upwards of a 20% chance to break, so with full DoTs it's never going to last the full duration)
-Pets get stuck on fences, pets randomly disappear only to come back after landing from a flight path (or end up as a soul shard out of nowhere), pets do not follow a straight line to enemies (probably connected to the unique LoS on Kronos)
-Suppression does not work; 3 points for a 6% hit chance on Affliction spells should be a 100% immunity to resists for everything up to 2 levels above you, this is absolutely not the case on Kronos
-Pet health and mana regeneration is completely broken, as has been said earlier in the thread (upwards of a year ago without being addressed; again, is this more complicated than adjusting a coefficient or tweaking some numbers?) effectively hamstringing Warlock leveling with a Voidwalker and I assume at 40 when switching to Dark Pact + Imp, since the Imp will run out of mana well before he should
-Voidwalker takes entirely too much damage, he is being reduced to half health or lower by a single even-leveled mob, almost dead or actually dead if attempting to chain-pull two or three mobs in a row; coupled with the abysmal regeneration, the only viable option on Kronos is to resummon the VW every few mobs to try and get to the regular and Blizzlike efficiency of leveling with a VW
In all these bugs have existed for over a year and it is quite telling to me that they have not been addressed. I will continue playing my Warlock, but getting some sort of response from the devs in charge of this sort of thing as to why these issues have gone unfixed for so long would at least be comforting. I hate drawing comparisons to Nostalrius, because that isn't really fair, but I also don't think the community (and Warlock players especially) benefit at all from sitting idly by and not bringing these issues up for as long as is needed to get something done.