Lollipop has completely wrecked my lg2 as well.
Battery instantly destroyed, I used to keep a charge all day now barely last until lunch.
My knock on no longer works.
My touch screen is terrible, slow and even unresponsive a lot of the time.
My phone in general is insanely slower to the point where even as I type this it is 3 to 4 words behind. Forget deleting any words it just auto fills as I try to delete and the space bar paralyzes the phone.
Just the other day it started scrolling on its own had to reset twice for it to stop.
My background home screen photo randomly enlarges as well.
Any Android techs reading this please help my once awesome phone is now a bug sanctuary.