Indeed, I would always pick a necromancer first too.
Arcanus,
I like to think of curses as something, that is not there to hinder you physically all the time( I don't disagree to remove it either, it is just that there are so many times that a game repeats it over and over again and there is almost nothing new entirely, that it has gained popularity and acceptance of the community of players.) but to actually make you say "Sh*t, now I am cursed" and think of how miserable your game has just become. Warlocks inflict despair, pain, horror , so taking this kind of feeling and presenting it towards the player who plays it against is the supreme purpose for me, that should be achieved. An example curse I would like to see is:
Adramelechs Pride
Fullcast, Range 1-2, 16 mana, Dark Magic School
Target hostile creature(can also be the opponent's mage) is inflicted with a curse. If this creature moves less zones than the other of the friendly creatures combined zones that they move at the end of this Action Stage, then at the end of the Action Stage an effect die is rolled by the caster, which effects are: 1-4 Cripple, 5-10 Cripple,Rot, 11+ x3 Rot.
What this means, by moving this creature and after him an another one of your friendly creatures - you are fine.Sure you could move the cursed creature two zones and buy time, but you would lose a valuable spell or action he could do in case of trying to avoid the curse. However, if you would move afterwards one more friendly creature, you will face horrible consequences. This could be a complete game-breaker for the beastmaster, as he likes to summon more creatures than himself AND to target him with this curse, would be extremely unpleasant. I am not sure if there are cards that could Cleanse from status effects (Should be), but they could really help against it. I mean, this is really a matter of balancing. Shutting down mobility, is a grudge, because by being less mobile than the others you are greeted by a curse.
I am running out of time here, maybe later or maybe even in a different section of the forum I should post this stuff