Glad to hear that you enjoyed the ascent of Grindsbrook, and pleased to hear that you've not given up on Kinder. Yes, it is a bleak place - which some like and some don't - but although it's a small area there are so many walks that can be built around it. I definitely think it's a place worth getting to know well.
I have to say that if heading east at the top of Grindsbrook made you depressed, then heading west may well make you suicidal! Really, it's much 'more', even if you keep to the edge paths.
Others may correct me, but I don't think there's a path NW from Crowden to the Downfall. If there isn't then you'll be walking in a world of your nightmares, you'll be sliding and slipping down the sides of peat groughs and sinking into the peat at the bottom of them, there'll be precious few landmarks or features and you won't have a clue where you are or where you're going. It is fantastic!
If you'd like to see the Downfall then Dizzy's suggestion of a walk from Hayfield is a good one.
But whatever you do, I hope you enjoy the adventure