I don't like full beat gaps in the map that might just be my personal taste but i'd recommend changing them
(complaint about bad contrast in patterns)
utitliize more stacks here aswell?
00:16:850 (1,2) -
00:26:225 (2,3) -
00:33:878 (1,2) -
etc
if it's red tick to white tick,
if it's not on a lead "instrument" (01:19:222 (4,5) -
but another point should also be made with contrasting spacing like 00:59:133 (4,5,6), where it's clear that one object is being emphasized more then another
so for kiai groupings like 00:56:071 (4,5,6) I think they can look like this http://prntscr.com/on0vdd, 00:56:837 (1,2,3,4) - http://prntscr.com/on0xdy and have the same properties of a stack