Composite wing may not have been the best solution for the old fuselage, probably not cost effective to redesign the wingbox and everything based on the wing. The 195-E2 is cheaper than the -300, but pax count and range put the -200 far ahead.
Sales of the 190 or 190-E2, 175-E2 are virtually non-existant.
Bottom line is sales. Jetblue did not go with E2, they went with 220. Jetblue is dumping its fleet of 10 year old 190's and will not have any by 2025 as they were too expensive to operate. Saving 25% on an aircraft that was too expensive to operate is not a plus.