Re: the Aura6-style 2-finger-sliding, I wouldn't think so as I think it's dependent on a capacitive screen not an infrared screen.
On the Glo/AuraHD on fw 3.1.1, I count only 2 taps to bring up the light slider from inside a book:
1 - tap middle of screen to bring up menus
2 - tap light icon in top menu to bring up light slider.
If you're on the Home page, Book list or similar only step 2 is required. Doesn't seem too onerous to me - although finger-sliding is obviously better
