For what it’s worth, I feel the same way about normal settings for FP1 in that it’s pretty easy. Switching to extreme though, it felt as though I needed to play perfectly to finish a scenario. To me, I think it comes down to most of the difficulty being frontloaded. A solid start sets you up for the rest of the game, while a rough start can ruin a run as the game continues to kick you down with every temp drop, event, etc.