Before I answer your question I should explain that I am refering to
an area wide condition, not just mine. And I should add that I am a
hobbiest keeping usually four hives each year.
I use all deep supers, and no excluders (except for specific
purposes). The queen has unlimited laying room.
I do not think swarming is a problem. I have never lost a swarm and
don't think a hobbiest should often (if ever) lose one. If you are on
top of things your queen will not get away. My nuc method of control
has saved me every time. I have not had the situation arise often,
but we seem to have lots of swarms up here. Many may come from single
brood nest situations. I know that in the Anchorage area a single
brood nest is a swarm generator. A single brood box will swarm every
time.