The current 35L is a fine lens. I would rather have a 24-70 2.8 IS lens though to cover this range and shoot with the 24 1.4 for prime. I shoot the 35 because it's fast and bright. I think my style is better served by a 24, 50 couple of primes though.
I'm probably in the minority here, but a new 35 1.4 prime wouldn't interest me all that much. The current one works fine. An aperture improvement to 1.2 could sway me, but given the new lens will surely bounce in price, say to 1799, and I paid 1075 for my v.1, I'm not expecting it to be a good enough value proposition for me.