00:25:153 (1,2,3,4,5,6) - I'm unsure about this stream, although it looks denser, it's the same spacing as 00:24:447 (4,5,6,7) - and 00:25:683 (1,2,3,4) - . You could change combo colors to a color that is way different to the rest of the map that could tell the player it's a new snapping.
Okay, i notice this is a thing that happens over the map, i'd suggest checking for denser 1/4 patterns and changing the combo colors for those in particular.
02:24:624 (1) - You could add a reverse to this slider, so long as the slider end is changed so that the reverse points inwards.