Silly question, but what would the problem be with playing say 1 red ball game and 1 white ball each week through the season? A bit like when they used to run JPL and CC through the season with some brief pauses for B&H and Gillette? If players are continually playing both short and long cricket in all conditions, then the arguments about it being difficult to adjust should drop away they just get used to both. White ball every Friday night, red ball every Sunday to Weds? People would even know when games were due to happen.
The only problem I could see would be that the overseas players in white ball would not just be signed for a few weeks they would have to be around all season - and maybe even double up as the CC overseas.