My first thought seeing her was "If they try and do Seth younger it's going to be awful and hilarious.
At first didnt like this episode because I generally am a huge fan of the amount of romantic storylines in the show and having 2 Kelly's to watch was almost too distracting- what a gorgeous woman. However by the end it had turned into a great episode in a way that McFarlane does well, having interpersonal issues between crew become part of a much larger problem. Loved the very end, so many ways they can go with that, I'm not even sure it will be addressed next week- they may save it for later, though my guess is next week Kelly will be the captain of the ship!
Ok so Ed would 100% have hooked up with young Kelly and gone from there. 120%. It's not like he was 50yrs old and a 22yr old showed up wanting to redo his bad marriage. It's just 7yrs and he is so over-the-top smitten with "older" Kelly that there I'm just not buying he wouldnt have slept with her. Also they glossed over fact that the pheromones are why Kelly cheated on him, that bit of info changes everything and you can see why Ed, young Kelly, and older Kelly might all think maybe things could have worked out.
So basically Isaac's return to the show is that he turns the Orville into a TARDIS. Um, ok. If they do have to "fix" something young Kelly changes and that's how they do it...large can of worms. Overall I'm actually hoping the season finale is not a time-travel scenario and that the last scene with young Kelly was simply to make for a great ending ie did she know something or not?
That show is an absolute abomination and if I didnt know better would say is an intentional insult to long-time ST fans.