1)I tried to keep the screen simple so I didn't put all the jog controls on the main screen, but the TAB key pops up a full jog window, just like the main mach screen. Or do you mean the single block setting for running programs?
2)I don't understand this. What plunge rate do you mean, on the drill screen?
3)I have never heard of that being a problem. I don't think its possible to have different jog rate. You could use motor tuning to slow the faster axis, but then all your G0 moves would be slower.