So my understanding of using "questionable" snap in taiko is that it's okay as long as it can be reasonably followed / planned out.
For example this set uses a lot of 1/6 in odd places, like 03:08:866 (326,327,328,329) - , but it works because the player is simply trying to fill in the gap between the first and fourth note.
Tons of taiko maps do that.
It's trickier to do with the 1/4 into 2/6 segments, but seems to follow a similar principle (over a whole beat instead of just a half).
An example of places where 1/6 isn't quite in the music but is playable anyway
01:11:267 (403,404,405,406) -
01:41:095 (607,608,609,610) -
03:08:866 (326,327,328,329) -
03:30:467 (504,505,506,507) -
All locations with 1/4 to 2/6 transitions
01:51:209 (687,688,689,690,691,692) -
03:18:895 (412,413,414,415,416,417,418) -
04:06:981 (33,34,35,36,37,38) -
05:12:809 (359,360,361,362,363,364) -
05:13:324 - The reason this doesn't sound correct is because previously the vocalist would step in here, masking the ending of the scratching sound.
You should move 05:13:438 (364) - to 05:13:324 -, it's still supported by the piano.
You can also consider putting a note at 05:13:667 - , but that might be too dense for the end bits.
So as someone who doesn't play taiko but sees people complain about stuff in it a lot, my recommendation would be to move 05:13:438 (364) - to 05:13:324 - .
Take another look at 03:18:980 (413,414,415,416) - and really try and decide whether transitions like this play well at all. Other 1/6 streams have the benefit of being isolated, but these 2/6 streams come right after deathstreams.
Spinners are a fun killer IMO I wouldn't use them but it is a quick fix for all of this.