I had this exact same problem. Love her to pieces OOC, but a ship isn't much fun if it's all handwaved. She finally idled out, and now my character's got chemistry with a new ship, and it's great. You can always suggest that you move the slow ship to a musebox/PSL if the player still wants to have fun with it, but in a game, go for the one that's actually going to get some traction.