This!
I honestly think
@catamount39 said it best,
There needs to be a DPi pro and an AM category,
Manufacturers automatically given pro status, and use the alternative bodywork and engine,
DPi Am teams should be the FIA/ACO regulations regarding the chassis and driver line up, without any manufacturer involvement, if an Am team wishes to use a manufacturers alternative DPi package, then they should be automatically put in DPi pro,
I do see this from the FIA/ ACO side though, I can see the DPi project being rather appealing to almost every manufacturer that wants an overall race winning team, while keeping some sort of relevance to their road car, and it would be a portion of funding to what an LMP1 team require,