I think Manyshot fills a desired niche, which is to say, the Orlando Bloom fanbase. And yeah, the moving and shooting thing.
Greater Manyshot on the other hand, from the XPH, is downright stupid. It reminds me of the barrage of laser-fire from Robotech ships that arcs around and takes out multiple targets even though the guns are pointed in only one direction. It's like the "death blossom" from the Last Starfighter. One release of the bowstring and 4 guys standing around in different places get nailed by arrows.
Cheers,
Cam