Good thing you dont really have to reverse engineer to support local servers unless you intentionally rat fucked your development process to make it only compatible with cloud. You should be able to just have a local server catch all those client calls. If Team Clementine can do it with Phantasy Star Online 2 (same concept of always online and made in the same era as Warframe) then the official devs can definitely do the same for their own game. Sounds like the classic “where’s me profit for this” argument.