I think the contrast between sections is kinda broken. I mean, there is a issue how it changes. If take a look how changes parts from non-kiai to kiai section, the difference is so huge. While the non-kiais are mostly mapped like a typical hard/hyper patterns, the kiais consist fully of Extreme/diff-spiked jumps.
Just take a look how it changed from 00:06:270 and 00:42:270 from relaxed patterning to active jump-spamming with hard to pass flow. (same - 01:15:270 and 01:42:270)
The most noticeable moment it's the end of this diff. 02:30:270 and 02:45:270 compare these 2 sections, the overall difficulty of this changes so drastically, while first part consist only of hard stepping jumps, the kiai mostly consist of huge-spaced jumps.
Kinda yeah, just improving jumps in non-kiai section would be enough. I figuring out that contrast there are already fine, but the issue was only how drastically you change gameplay intense within song intense, it's looks a bit disbalanced.