Not yet, that will be the final part of Episode 1! Next update we'll get Rin to join the roster.
Itch has been having some issues with downloads for the past month or so, honestly not sure what's going on there. The only thing v018c does is fixes a game breaking bug during mansion heist; I wanted to push that out before I left for vacation so that fewer people would be affected by it.
The traits will (and some already do) affect certain character dialogues and allow for additional choices, so I'd say they're fairly meaningful.