that's a good question.
I can report my experience.
Planning is mostly skill.Being 75kg,with good fw background,it was earlier for me keep going with the 127/9,5/48 than my buddies with smaller gear.But I use to sail with a same weight guy who more or less goes as quick as me using 2012 117w/8,7/44.
Note that "freesailing" is different than comp (where you always have people covering you or dirty wind).
I've just bought the new 117 (holding my trusted 127!) and hope to figurate out as soon as possible the way to go for my need.