What if survivors had unique talents?
I could also see this being a mechanic that ties with prestige levels. Like Meg runs 1% faster than other survivors, but if you prestige her it increases by 1% each prestige level, maxing it to 4% in P3.
Claudette could heal 2% quicker passively, and possibly up to 8% in P3, stuff like that.
I think it’d be cool if survivors did more than essentially be different skins, but nothing that would break any of the survivors or make one way more OP than another.