I agree with Ronin- many of the premium Fuji lenses are on par IQ-wise with their L equivalents imo all at lower prices. I'm thinking 16, 23, 56, 90, and the 50-140. Yes I know, you're not getting the full DOF control- but for me, the light-gathering ability and increased DOF means less out of focus shots in low light.
That's if my camera would lock on correctly in low light 100%
With most of the premium focal length options out of the way, they're likely going to begin to develop low-cost alternatives. Case and point- the rumoured 35/2 which is supposed to be cheaper than the already cheap 35/1.4