Because I really want to spend all day, every day, grinding.

/sarcasm

QQ less. Grinding will be fixed with chains (and minor SP increases probably). But there has to be equivalent content for solo players to level off of. Trivial-and-meaningless-tasks (My friends and my long word for leves) are it.

On a side note. I quite enjoyed duoing Hala/BW leves on 5 star from 48-50 in 3 days.