There are a couple of problems at this stage in the game.. #1 How well mated can those queens be? #2 How much time do you have left? It will be another 21 days before ANY brood hatches.. that will put you into the middle of October.. thats about two/three weeks before I usually button up for the winter here in Iowa.. I dont know when your COLD starts moving in to stay...
I agree, Wasting queen cells SUCKS! But sometimes it needs to be done...
In your situation.. I would have called around and found a replacement queen, OR, combined now, and split in the spring as the others mentioned...
So you have new queens, at a time there are FEW drones.. Will those queens make the winter? Are the hives they HAVE strong enough to overwinter?
You are leaving solid ground and embarking on a journey across floating thin Ice.
It IS possible to get those hives through the winter if you have the resources.. Bees to give them, and extra frames of pollen and honey.. What you have to ask yourself is... Will it be worth the struggle, the worry, the risk, and the loss if none of them make it? Is it worth weakening a strong hive to do it?
"If you give a GOOD hive a sub par queen that was not mated, or was not WELL mated, do you doom that hive too?
Maybe you still have a good drone population and this is all a bunch of hogwash..
So,
Even if the queens are WELL mated, they need to build up for winter, and they do NOT have the time.. At the very best, they could roll out TWO new generations of bees before they have to begin hunkering down for winter..
If you HAVE to save them, put them in nucs. Make sure they have the resources and bees they need by adding them and feeding and hope for the best..