Will IW5M have all official updates/patches? Like the newest gun patch that infinity ward put out not too long ago.

I'm pretty sure but i think that it will take some time.

i don't know

It will be up to NTA as to what official patches he wishes to use

As for implementing his own patches to balance games, he didn't really do it for IW4M so I don't think he will for IW5M unless there's a huge demand for it (model akimbos)

Only time can tell for sure