I agree that trapping out is great!
I never said there were negatives to trapping. (Except maybe the wax left in the building, which becomes the homeowners problem, not mine.)
I simply had never considered using your method. I have always used a small hive or nuc that I wanted to build up. Your way sounds great. It does involve more work, but you do get the benefits of several new, good hives.
My other point is that, while I have not done a great number of cone trap-outs, I have never observed nor heard of a queen leaving the original location. The instructions that I have read (NOT my observations or experience) indicated that the queen would stay in that location and would die because there was no pollen left to raise brood and, eventually, few or no young bees left to feed her.
That is why I ended my post with "I am open to correction or others opinion."