Hey there, Apologies for the delayed response!
Both of these things should be possible, correct!
Correct!
The mode on the MIDI Maestro can be used with any device, just it is specifically made for the BeatBuddy, so it may not work as expected.
Using the MIDI Maestro app (available on the Google Play store and the App Store) you can create your own custom mode that can combine BeatBuddy commands with Ableton controls.
Watch this video on the MIDI Maestro to help get your feet wet!
You can also read more about the MIDI Maestro in the manual