In all honesty, even back during the last vote, I recognised that both new rostering systems are identical in all respects, except for how much they will cost BA. The currently planned system will have optimisation which if BA gets its act together, will produce precisely the same rosters as the new proposed system. The only advantage with sticking with the current plan is that we all know they will cut corners with their software to save a penny, which will of course cost a pound in inefficiencies which would work in our favour.
I've personally spent very little time worrying about the new systems - I've hardly even read what little literature we've been given. The one BALPA has recommended is coming, and I'll learn how to use it when it arrives.