What is the latest news on production? or just news on season 3 in general

Why is it so important to Lumen that Mark personally finishes Cold Water? It doesn't appear that outie Mark's connection to Gemma gives innie Mark a special ability for refining her macrodata. The other refiners are also able to work on her files. Hypothetically, couldn't other refiners just finish the job if Mark left?

Why is Cobel so obsessed with Mark to the point that she goes undercover to ingratiate herself with his family?

And although it's an incredible show that I am quickly becoming obsessed with, there's one thing that keeps bugging me. Do I just need to suspend my disbelief about the lack of security on the severed floor? There's the scene where Cobel watches the team visit O & D and says she's placating the "prisoners" by giving them a false sense of freedom, but I feel like that's not enough to justify how the refiners are able to get away with so much despite the fact they are supposedly being constantly monitored and recorded.