What's the point? Is the Pi CPU a bottle neck for CosmosEx?
Unless they are 100% the same form factor and I/O header pin-out then the CosmosEx adapter boards would have to be re-worked which is a big NRE (non-recoverable expenditure).
And then you have two platforms to write firmware for and debug? Surely too much for a developer already struggling to find the time to fully support the platform he's got to the level he'd like