Here, looks like I was mistaking thicker lines for lipstick. Her upper lip is usually colored, though.
This is usually the Design I think of im regards to raven, but if you're shooting for a more comic accurate model:
(To be honest though I find the comics version pretty generic. Black lipstick is there, though!)
So, comparing the above to your version:
-hair is too short and uneven, in most images I see it is down to just shy of her shoulders with a frontward swoop down. Alternatively, regular widows peak bangs.
-cheeks are too round, a slight bit of inward curve may define her face a bit better. Raven's got a pretty sharp jawline, (though if you're doing a full redesign I think the look you've wrangled so far fits her character from the show a lot better)
-her eyes, while a great SHAPE, are still too small! She looks squinty, rather than perpetually judgemental! She also tends towards eyeshadow and wingtips! Try poking at em a bit to make them bigger if the prior two don't fix it, I've ranked these by priority so don't worry too much!