I tried to decipher the regs, trying to figure out if it was legal. In any case, even if a loophole existed for such a design, I don’t think it would work in this open wheel category. Cooling, aerodynamics, weight distribution, tyre usage, cockpit safety… all of this would need a complete rethink. I would imagine most of the accumulated knowledge of the current mid-rear layout would be rendered irrelevant.
Basically, even if it did work, I’d be surprised if it was as fast as the 2014 Caterham.
This is based on no science whatsoever and is only my opinion.