Sometimes I think I learned some lessons from the feedback I received from this FM, but other times I wonder. I definitely didn't make it 'difficult' on purpose, but I certainly didn't want it to be easy or not challenging. It's hard to tell what people find enjoyable. I guess my assumption has been that players expect stealth gameplay, since, well it's a stealth game. But it seems if it's too difficult to get a perfect stealth score then that might turn some people off.
The funny thing is, I always write the FM with ghosting in mind (or at least, no blackjacking). With this one I didn't really test it with going around blackjacking everyone. It wasn't until I watched some playthroughs that I realised how easy that made it