"another magneto argument with the FAA"
That is essentially what it becomes for a certified bird. ANY part you change has to go through the certification process that cripples all but the deepest pockets. Once you count the cost, you realize its unrecoverable and most businesses can't afford to operate like charities.
Just look at the fortune that has been spent just trying to get TEL out of avgas.
The process needs to change, or at least catch up to the technology that is available.