It's late - just made me wonder what one would actually do if a real-life dealer had his own 6 deck shoe, and the heads-up player had his own real-life 6 deck shoe and each had a cut card at 75% in the Beginning and each got re-shuffled whenever his individual 6D shoe hit the cut card then what the heck might change if anything. Since each 6 decks would have it's own TC or would you just kind of go with the flow of 12 decks to start and then he re-shuffles sooner than you have to re-shuffle and adjust from there
Talk about a meaningless question lol.
Doubt if this fact of virtual separate 6D shoes in PA (I believe it to be the case like you) has much of an effect on Basic Strategy House Edge.