This mission is top notch.
From the visuals, the sound, the gameplay and pacing, nearly everything was perfect, very dark and moody colours, rain, intense feeling of isolation, challenging guard placement and satisfying secrets. Non-linear gameplay, very open and possible to achieve objectives with multiple points of entry and tactics.

The only thing missing was a bit of lore, readables and personality for the main characters, to give them some life. Maybe even some custom dialog (but this is honestly nitpicking at the highest level since I didnt really notice it until I was done playing, I was fully immersed while playing).
It was one of the most enjoyable missions ever!

This is definitely one of the most challenging missions I have ever played, the ghosting part took me over an hour.
It is doable, but you have to be really patient and quicksave a lot.

Thank you for producing this masterpiece for us to enjoy, it must have taken a lot of time and effort.