You could also consider just buying a couple more queens and requeening the weaker hives if you really think the problem is with the queen. But you do need to prop up their numbers with a frame from a stronger hive. No matter what you do, you'll be waiting a bit before these weak colonies start picking up, so you really need to give them some eggs / brood.
2 options:
1) requeen.
2) as previously stated, hive the packages and do paper combines.
I would not though put a fresh package in an already established hive.