That's right, Shakil, it's exactly why I love my Korg i30. Yes, it has a touch screen, great for inital set-ups, etc., (all of which I have stored in C and D banks) but you can't beat the sliders for on-the-fly adjustments. I've never had a disaster on gigs in three years with it.
That's why I think Korg missed the boat somewhat when they brought out the Pa80. By itself, it's a better sounding board than the i30, but why they didn't keep the sliders is a mystery and a major gaffe.