In Guitar Master 2.8 Version, we've brought many features considering your suggestions:
1. Tuner algorithm is improved to make it more stable
2. Pendulum Mode of Metronome is supported, Tap Beat Block to quickly change the Visual Mode
3. Now you can see the note playing in Scale and Chord Mode when you tap the top title bar.
4. You can see the strumming patterns of Chord Progression now.
5. Now you can search Loops, Tuning Modes and Scales
6. More Settings:
a. The arrow of Strumming Indicator is allowed to flip up down.
b. Allowed to customize input channel, and Apogee One is supported