Same. If Apple had any sense they would have just slapped an Apple logo on Dark Sky and called it the new weather app, then used it to influence their core design language throughout the rest of the OS.
I’m using the weather app now, but am still longing for the spiritual successor to Dark Sky.
I had a similar feeling when Google bought and killed Sparrow. They should have simply replaced the Gmail app with Sparrow, instead, they killed the only email client I ever genuinely enjoyed using.