I actually don't like to change at the beginning of a round.
I remember reading in Knitting Without Tears
that Elizabeth Zimmermann said since she works in the round most of the time that she never thinks about changing at the beginning of a row. I think I thought if it was good enough for her it was good enough for me.
It is also a yarn saver and 'tight' is my middle name, so suits me well. I like to change in a place where I have some St st going if I can, and now that I've learned Russian join if I'm not doing St st but lace or something I'd use that.
So not an answer to your question, but something to think about.