From what I've learned, you can spawn on the "Street"(behind cat 1), Elevator 2,3, & 4. If you want to spawn on elev 2 you have to block the 4 spawn spots behind cat 1. You have to place "static" objects such as deck crew or other aircraft in those spots. If you want to spawn on elev 3, you have to block the street and elev 2, and so on and so far. See link below:
https://forums.eagle.ru/showpost.php?p=3626642&postcount=8
I would not expect any fixes on the current carriers since the new carrier module is being introduced.