I realize that but the reason why I ask:
Before the parry change as long as you had a mainwield you have parry solely based (100%) on that weapon regardless of second hand being empty or not. This meant that Balance of the sisters could open up a number of interesting combinations. EG Better parrying main wield and malediction from secondary.

Now with new parry (Which seems to be a 50/50 split) there seems little point in taking balance. Sword primary dagger secondary parries just as well as dagger primary sword secondary. So effectively balance of the sisters becomes an "Anti-Space" build as you wont take hits switching weapons.

In the majority of cases I would argue switching weapons and taking a different legacy is a much much much better build option that Balance since the parry change. Given I cant find a post saying balance was refactored I thought I would ask rather than assume.