Fact 2: You continuesly piss me off by NOT PROVIDING CHEATCODES.
Fact 3: It barely costs you any development time to add -noclip and -invulnerability, accessible via console or simply by pressing the right buttons (dnkroy anyone?)
In flooded district, you don't need to lower the bridge. You can jump into the pit and land on the edge of the back chain. Probably works even better when you land right onto the chain, but whatever.
I'm currently having fun trying to find a spot that doesn't crash Dishonored here: /watch?v=d7c7zllMJ5s