I think it's fine at current state. Sure, the first half of kiai felt more intense mainly due to the intense violin but there's no proper 1/2 sound that warrant it mapped at 1/2 density. Adding the fillers you've suggested kinda throws things off a little as I didn't use any 1/2 fillers throughout the map. Meanwhile the latter contains more obvious interesting 1/2s which is more intuitive to follow at 1/2 rhythm compare to former if I were to mapped it with fillers.
All things considered, I won't mind following your suggestions if more people brings this issue up