0 Six: fails you.
1-2 succeed you limited success.
3+ succeed critical.
Is this correct?
In a normal skill roll, no. Combat skills work a bit different. In Melee for example you choose a bonus effect with the extra sixes you rolled, so if you rolled two sixes, the first one indicates a success and with the second one you can choose "Disarm" as a bonus effect.You would like to say, that it doesn't change whether 1 or 2 succession is the same?
I usually reflect a second success by reducing the drawbacks of the limited success. So 0 success = Fail or Succeed at high cost, 1 success = Succeed at cost, 2 successes = Succeed at cost, but only minor drawback and 3+ successes = complete success, no drawback at all.You would like to say, that it doesn't change whether 1 or 2 succession is the same?