SirMark9 gamemd-spawn.exe makes it sound like you have some ancient CnCNet version that still did the file renaming and thus has replaced you original gamemd.exe with the one that made multiplayer spawns possible. Reinstall, get that original file back, patch it to 1.001 and you should be fine. It says it couldn't load the executable because there's probably no file named gamemd.exe in the directory and even if it's there, it's the wrong version.
And just in case, don't install MO where your YR with its own CnCNet files is.
The updates to the internal version of the mod are continuously being made, as you can see in the previews on our related pages like Twitter or ModDB profiles, but I can't give you an estimate on a release date. It's just how this thing, a mod, works. There's now many people working on many pieces of the next update, which is demanding when it comes to the amount of work required, probably bigger than anything before, and they all have their lifes first, before making contributions to the mod. All I can say is that the finale and the updates will certainly happen.
The only requirement we can give the AI to rebuild MCVs properly is 'when AI no longer has a Construction Yard', that's why it ignores the Field Bureau/T2 prerequisite. Otherwise it would just keep building additional ones and causing some serious issues. It's similar to the case with AI using spies without a lab.