... The amount of local swarm cells that go to waste for lack of a home is a shame ...
Agreed - but it's not just swarm cells which are wasted. Recently, a guy posted on here who had killed both of his 'hot' queens (because he'd been advised to by some internet source) BEFORE raising any replacements.
I've likewise been doing the rounds of my apiary recently, also re-queening any colonies which were showing signs of being 'warm' ('hot' being a thing of the past, thank goodness). I came across one which is fine on a good day, but can become seriously grumpy should there be an approaching weather front - and on the day I checked it, that colony behaved absolutely perfectly ... so, what to do ? I eventually settled for re-queening with a select virgin, but saving the existing mated queen in a roller cage - but at that point, with no particular end-use in mind ...
Later, I thought about what uses such older - and generally undesirable - queens could still have. Along with a few cupfuls of bees they could be used to 'prime' any new equipment (boxes, foundationless frames etc) to leave both their smell and wax footprint on them. They could even be used to draw new foundationless worker combs - and that has now become the new role in life for that particular queen: she's currently heading a small colony who's sole purpose in life is drawing new worker comb from their ample supply of sugar. As each comb is drawn and laid-up, it'll be popped into the freezer for 2 days and then stored. Sure, I'll need to give that colony a frame of brood from time to time, but that's a small price to pay for such valuable combs.

LJ