Compatability is an ongoing thing with DJI products.
What irks me is every model there are new batteries, suppose you can expect that for aircraft design and improvements in battery tech.
But it just seems like an easy way down the line to force upgrades, simply by making a battery obsolete for a model some 4 or so years old.
I love my old M1P controller, which is basically the same as the M2, telemetry on the controller in case of device disconnection or failure is always good to have on the screen.
You can get home quite easily by various means, even if you are out of VLOS a little (or a lot), as long as you have aircraft - controller connection.
I'm guessing non of the SC's have this if they lose visual ?
The existing SC (and presumably the new one) has all the telemetry functionality of the regular M2 controller.