For the sharpening, I would suggest having a play around with the settings, exporting different versions as tiffs to open up in Photoshop and then PixelPeep to see what sharpening amount you prefer..
I agree with you, I find I can get a sharper image exported from LC than if I try to sharpen it in Photoshop.
I also have done a similar thing to what you have suggested, reduce the sharpening amount from 3 to 2, and have saved that as a new preset... but have a play around to suit your taste.