Bill,
I believe you're overthinking it. Let's take a hypothetical situation: The better player offers the weaker player a choice of either 5-4 or all the breaks. It must be a fairly close game or it wouldn't be offered in that manner.
If they are playing alternate-breaks then the weaker player only gains 50% of the breaks by accepting the break and he plays 5-5. He also denies the better player 50% of the breaks.
If they are playing alternate-breaks and the weaker player accepts 5-4 then he gets 5-4 & the break 50% of the time.
If they are playing winner-breaks and the weaker player takes the breaks then he is playing 5-5 & getting all the breaks, the same as if they were alternating breaks & he took all the breaks. The only thing gained here is an opportunity to break and make a few balls. He also denies the better player the opportunity to do the same to him. I don't think that's worth a guaranteed ball all the time.
If they are playing winner-breaks and the weaker player accepts 5-4 he will break 50% of the time anyway if the game is close.
If the weaker player takes 5-4 and loses 10 games in a row then he wasn't getting enough weight anyway.
I don't see any scenario at all where the break is equal to 5-4, not winner-breaks and not alternate-breaks, unless of course you threw in a free-foul per game
.
Dennis