I think the way it is right now fits better with the "slow" part, less density and still follows it very closely. I'd prefer to keep it the way it is right now.
03:05:495 (5,6,7,8) - I increased the spacing on these because I feel like they're the only ones in this stream that deserve to be buffed since it's the loudest of the 3 groups of 1/4s
I have mixed feelings about this, I understand that there is a bit of the song after and before but since it's so repetitive as a player I would feel bored so I didn't really bother mapping it.
I don't think it would add to the experience of the map rather it would make it feel longer and boring.
For the spinner on 00:11:164 (1) - I could remove it but I think it does end on a strong enough note.