*waves money* me! me! I would totally spend my money for this idea.
I think the alternate skill idea, all with the same stats and CD so that people can't buy 3 skills and use all 3 of them would work great. I've been complaining about the rocks since beta. I still hate them. I don't even play my sage except as a healer every once in awhile. If I could throw something other than rocks, something as cool as lightning, I might actually play her. And even if I didn't I'd spend my money on it. EAware are you listening? People want to spend money.
If I understood what a previous poster was getting at, I think using saber strike as a "saber throw" once you choose sage and get that 30m would be great. All I can guess is that sages use their glow bat for balance so they don't fall over while throwing rocks at things. Not exactly cool.