1) Yeah, I agree with score spread is not so good. I can't make any other diff due to my inspiration runs out.
In before, I asked quintitem making a guest diff for solve this problem. But he has been busy, it was denied.
2) It isn't too long. I think under 5 mins song is acceptable. Also it's slow song.
3)
[Easy] is very easy. It's just for reducing boredom for playing and mapping. OK, let's go till end.By the way, they are true. However they are not major problems.
I have a similar map that ranked already.
http://osu.ppy.sh/s/19912Anyway thanks for checking, SH.
EDIT : Length of Easy has been extended. And fixed heart slider in Hard.