I agree that everyone maybe not like this Snape but frankly I think it is DH canon. Which doesn't mean he doesn't have other layers though.
Honestly, I wrote this for myself (with J's help of course). I wanted to know how Harry feelings about Snape changed. And I just realized it but what Albus Severus is for me is the power of a name-By giving this child that name both 'Albus' and 'Severus' are loved unconditionally. *making myself tear up*
I'm really happy you could see what I wanted to convey.