Lust - I mean slice this ability out and give a different one. No cost can justify this one.
Gluttony - Actually, the Devour on it could be cheaper. It has just 6 HP, and costs like 8, Elite Otyugh has 5 HP and costs 4.
Greed - You could chop the stats down so it is easier to get rid of. Steal is very powerful and should have drawbacks.
Envy and Pride - Get the Pride's ability back to +3/+3, but make them passive. As in "no activation cost, when the creature is on the field is happens." So, when Pride is on, all your creatures get +3/+3 as long as it is there, but no more. Envy gets the bonus, but it decays as you remove the enemy creatures and... I hope you get what I mean.