As far as your recipe. Looking much better than originally posted. With it as-is you're going to be looking at a pretty low original gravity if your efficiency isn't great; OG of 1.042 with 70% mash efficiency, which is probably reasonable to expect, if not lower (depends on how you do the partial mash and sparge). And with that low gravity, your 53 IBUs will definitely make the beer bitter.
That said, I'd suggest bumping the DME to 3 lbs. I'd also bump the Crystal 60L to 0.5 lbs to give it more body, and caramel sweetness to counter the hop bitterness. Assuming a mash efficiency of 70% that would give you an OG of 1.055 and 53 IBUs, for a BU:GU ratio of about 1. Decidedly bitter but not out of your mind mouth-puckering bitter.
I would also move the 30 minute hop addition to 20 minutes, for more taste and less bittering. Something to consider too is using only one variety for taste (your 30 minute hop addition) and one for aroma (your 5 minute hop addition). Oftentimes simpler is better.
EDIT: Have you done a partial mash before? If you want to skip that, get rid of the 3 lbs of 2-row and substitute 1 lb 12 oz more light DME for it. If you did that you could then just steep the Crystal 60L (it doesn't need to be mashed) to dissolve the sugars into your wort.