swipe needs to be deal 4 damage and 2 to everyone else as a result of every other wave clear getting power scaled
Only chance such an old card getting a buff is it being in the next Core Set, which would mean that still you would have to wait until Rotation for this.
New card in next expansion:
6 Cost
Double Swipe.
Deal 4 damage to a Minion and then 1 dmg to all other enemy minions. Then deal 4 damage to that minion, and 1 dmg to all other enemy minions.
If they keep the Forge mechanic, then just make this a 4 cost with the Forge optional for the 2nd half.