This isn't going to be super formal since I'm not a professional reviewer, so bear with me.
Starting off, I think this is a genuinely good mission. I gave it an 8/10 after all. The textures are obviously very nice since they're custom, the city layout is pretty good, and most importantly, I was able to figure out the puzzle parts of the non-optional objectives. That's mostly a joke but seriously, the number of times I've spent over an hour trying to figure out a non-optional puzzle in a mission is honestly frightening. Heist at Hilbert's Highrise Motel still has me shaking. Also the music was so good, honestly not what I expected from a Thief mission but I vibed with it SO hard.
Jokes aside, I have some problems with it, so I will list them out.
1) The loot placement and amount is kind of weird. Like, I didn't struggle to meet the loot goal for expert, but there was simply too much loot and often in places where it didn't make sense. Every time I saw a bench, a patch of bushes, or a doorway, I knew there'd be loot and it often didn't make much sense. Like, dear god, how many women keep dropping their necklaces near benches or on doorsteps? Why are there golden amphoras on most streets?
2) The custom textures are sometimes a bit much and others break immersion. This is honestly a small one since the only thing I can remember off the top of my head is a spritzer bottle. Like, an honest-to-god modern spritzer bottle you'd see for kitchen spray.
3) The places where you were able / needed to shoot rope arrows to get into Bafford's weren't really set up? Like, for all intents and purposes, they looked like stone engravings, so I had no reason to initially assume I could shoot a rope arrow into them. It was only through trial and error I figured it out.
4) Finally, and this is the big one, the city was far too large in comparison to the interiors you could actually go into. Obviously, not every city mission should make every visible building have a fully done interior—honestly, it'd be sort of insane if they did—but it felt like only 5% of what I saw in this sprawling mission was actually something I could enter. I think it would've benefitted from being about half or maybe two-thirds as big so it didn't feel so "empty," even though it's obviously full of content.