Without putting too much thought in to this I think there should maybe be 3 endings per love interest and 3 endings if you don't have a love interest.
Good ending - Panam (Super happy ride off in to the sunset, all your friends lived through the raid)
Mediocre ending - Panam (People died, you get to be with Panam, but she's unhappy about losing all her frtiends)
Bad ending - Panam (Panam dies, the clan dies, it's all your fault cause you're an ass, you go back to town)
Good ending - Judy (Super happy head back to Night City and get a cool new super high tech "Hacker apartment" for you and Judy, all your friends live)
Mediocre ending - Judy (People died, you don't get a cool new place to live but you get to stay with Judy)
Bad ending - Judy (Everyone dies, Judy's really hurt by everything that happened, stay together but she's really torn up, no cool apartment)
Good ending - No romance (You're the legend of Night City, everyone lives, your personal apartment gets upgraded, you get a new gun/vehicle)
Mediocre ending - No romance (People died, people are sad but happy everythings over. No new sweet apartment. Maybe some guns though)
Bad ending - No romance (Everyone on the raid dies, nobody is happy, people look down on you as a scumbag)
etc...
And whether or not you get a good, mediocre or bad ending, they should all allow you to go back to Night City to live the rest of your life as a hero, a normie or as someone people don't like. Once back in Night City, certain NPC's would say nice/bland/bad things about you when you're around them. Maybe some new quests based on the outcome you got??
And maybe the ending where you become part of Mikoshi is the only ending where you don't go back..