Of course it is. What do you think it's using the LTE connection for? The fact that you need the LTE in the first place means you don't have a reliable connection. Video doesn't just magically beam across.
The MA2 already has this transmission spec; likely it has been migrated to the M2 series after having been developed for the Air2. It's probably a more 'sophisticated' way of communicating signal.
Yep fly home and land manually whenever possible. Otherwise, if you don't mind opening the RC up you can put some Blu-Tack or similar in the speaker hole. This makes it much quieter without completely muting it. I find that to be the perfect solution.