Of course list is long. The order of character in save file is a thing. If you have for example first character on Json data Freddy, Freddy didn't existed then in the game so your save file is Cleary recent. Characters should be in order from their releases in Json data ( trapper, wraith, Billy, Dwight meg Claudette Jake nurse nea Myers etc...).Also even player ID could say something about you. As devs probably know what id's old players have. If you have steam account made recently they can see that too so if you are not having 2+ year steam this isn't too good. There are also many small things that can determine a save file is hacked or not, i learnt many of them. I worked very hard on my save file and I made it look extremely legit. I even reported myself from different account they probably checked me and I didn't got banned so I guess the save file I build is good.
'' IN CONCLUSION IF YOU KNOW TO BUILD A LEGIT LOOKING SAVE FILE WITH LEGACY YOU WON'T GET BANNED AS IT'S TO HARD TO TELL ''