I know someone is going to say that this isn't a life-simulator, but a proper family/dynasty tree would be really helpful. Pro wrestling has tons of families and dynasties that are very difficult to replicate in game and it's currently impossible to simulate some real life situations, that have been relevant to a wrestler's career.
Like...Masahiro Chono & Jazzy Gabert/Alpha Female
or the Anoa'i, the Maivias, the Snukas & all the married into people
or The Hart Family with the likes of Roddy Piper, the Neidharts, British Bulldog, Tyson Kidd, etc.
Then there is Lucha Libre, where family relations/good friendships often take over gimmicks and masks from relatives/family friends. Relationships could really use some more expanding on, with more influence on the game.
One issue, ofcourse, is the fact that not every family relation in wrestling only involves wrestlers themselves. But a family tree, where you could create "non-wrestler"-placecholders would fix that aswell