It certainly looks much much better than in the 2.12.3 :)
However, in my opinion (and i'm an amateur, judging only by my personal taste about readability) there should be more space after the vocal group. It's because of the lyrics: now the next group is positioned 10.5 staff spaces below the centerline of bottom vocal staff (tenor staff), but the visual "center" of the tenor is lower - it's in the middle between top staffline and bottom of lyrics, somewhere around 4th staffline. So i'd add something like 1 staffspace after a vocal staff that is the last in group (or is alone).
The other thing is the spacing of staffs that are not in group. I think they should be placed 10.5 staff-spaces below and and above other staffs. (so in this case the gap between percussion and piano should be bigger). Here the percussion is not the best example to see this, because it has only 1 staffline, but imagine a regular staff in its place.
cheers,