1) Silent mode: Auto find highest possible freq at lowest voltage and set fan as low as possible (try to keep chip temps below 80 deg)
I like the sound of that

One feature that would be amazing (I'd pay for it anyway lol) would be if you could set a schedule, like run performance mode 8am-5pm (I.E while people are usually at work) and silent running the rest of the time, that would be awesome.
It's on my list, but I will focus on auto tune first as it will help more people (according the vote