The thing is there is only so much space available, there were only eight GT-Pro cars this year, i think that maybe there should be a two car maximum per team.
The non-hybrid lmp1's are a fairly pointless class so those spaces could be used better, nissan used up three spaces pointlessly.
Ditch the non-hybrid lmp1s, refuse entry to cars that haven't raced at a previous event or proved to set competitive pace in testing and with the extra grid slots there are enough spaces to augment the rest of the classes with good racing cars.