we all have different setups, or hive configurations. i keep bees in double deeps. i have kept bees in 3 deeps. what a nightmare and a great deal of management. i can't speak or say what works for other beeks with different hive configurations because i have no experience with this.
great replies by tec and tefer.
like tefer said, brood can be extended into the bottom deep, so this is one reason why i do not reverse, but i have also found them crammed into the top deep with a totally empty deep on the bottom and found that the queen moves down. another good point tec made was about the bottom board, and making sure that it is clean or switched out. for us northern keeps, we can have piles of dead bees and other debris on the bottom board. i tend to clean these out late winter going into spring, with a slim jim, that i can reach into the back of the hive with and pull out. later, when the weather warms up, swarm season arrives, divides to be made, i will clean that bottom board off or switch it out.
another thing i have learned or think there is merit to; many of us scrape all the burr comb/ladder comb the bees build between the frames. i don't scrape all of this off or discard it. i 'break the seal' of the ladder comb, but leave it in place. just me maybe and my thinking, but i think this enables the bees and queens to move much more easily between the deeps.