Tried this without ever putting a hand at vanilla Ketsui before(unless that first time I booted the rom with the .bak file in the zip file counts). Pretty awesome, just love manual rank and the new color palette makes the original look bad whenever I play the original or back label, oh and being able to screw up and sometimes survive due to that flipping bit issue on the bullets too.
And then, regarding back label mode, was it supposed not to play like arrange? First thing I thought when I saw the back option formation was that it would be quite useful in this mode, but then it plays just like normal Ketsui with a few glitches.
The scoring mechanics still give me trouble, but on with not getting raped at stage 3 anymore before anything else.