The 35mmL also tends to focus differently at different distances. I like mine, and found it to be better after Canon adjusted it, but not perfect.
I have no complaints about sharpness, at least I didn't until I got my new 24-70L which is definitely sharper, but doesn't do f/1.4.
Really? The 35L would do that too?
Pretty much all wide aperture lenses do that, the margin of error at f/1.4 is so tiny. Off just a little bit, and it can look bad.
However, the AF speed of the 35L is excellent, just don't expect shots near mfd to be as sharp as those at 5-10 ft.
That said, here is one taken a day after I received mine, and its near mfd. I went around our small county fair with my 5D MK II and the 35mmL, and found it to be a good focal length.
Its a shock of wheat, and very shallow depth of field, but also very sharp.
Of course, if you get stuck in a large arena, just do a big crop, the lens stands up to cropping. This was taken half way up into the seats of my friend driving clear across the arena. I had to crop it a lot, but the level of detail is excellent, even at 1:1.