Yeah, I don't really know the details of each district, but I was surprised the PA House and Senate are both rated as Lean R.
With that said, if this is really a D+6-D+8 year (as some polls currently show), we could see a lot of surprises downballot.
It'll take more than a D+8 year to flip the PA Senate, of course not counting unknowable severely anomalous local hijinks. The Lancaster County seat we have to flip is about an R+13 seat, and despite Governor Wolf pulling 47.5% in Lancaster County in 2018, and the blueing of the Philly burbs spreading slowly outward to the secondary collar counties, I imagine it's too early to start expecting Democrats to flip Lancaster County.
A D+6/+8 year could give Dems control of the PA House, though.