The correct answer to skill floor is definitely understanding 1: Skill floor means skill barrier-to-entry. When the Silencer first came out, everyone was talking about it as a high-skill-floor, high-skill-ceiling ship. Interceptors are the same. You can't just shrug off an attack. You have to have x level of skill (be it 25, 35, 45) or you will just die. Tournament piñata as someone earlier said.
Performance floor would be understanding 2: Even the worst player will still perform at x level (be it 25, 35, 45) because the list just can't do worse than that.
Low skill ceiling means that the best player effectively can't play it because the maximum decision interaction level (be it 65, 75, 85) just doesn't reward any skill whatsoever after a point.
Low Performance ceiling is similar, but is on the scale of how well the list is able to perform in tournaments (be it 65, 75, 85), even in good hands, meaning it is a trash list.
So Lothal/Fenn is a low skill floor, high performance floor, low skill ceiling, high performance ceiling list.
Or in other words, a death sentence for the game as we knew it.