Why the heck would you want to make easier something thats supposed to be hard? If you make something hard easy its not hard anymore and that makes no sense at all. Its the best the way it is.Youre not mapping a song to make it difficult. You map a song because you probably like the music and would like to create something that you can share with other players. If a song is calm/slow at a section, then that section is not meant to be fucking hard. If it was, then the artist wouldnt have made it calm. Easy as that.
The AR change would be from only 1 point or 1,5 maximum !Make that a ranking criteria, if neccessary. Give the possibility to go all the way through, I'd love to see gimmick maps with heavy AR changes.
Like you're having a slider ar8 and the next one has a higher sv (ex. 1,50x) then create an ar9 or 9,5 for this said slider.
Hope you see my point of view.