Pretty much agree with what everyone has said here. Nice to see some more OT in the Legends line, particularly something like the Stormtrooper, which I've always thought should be as readily available as the Clones in this line. People always want/need more Stormies, and it would even make a good option for kiddos (particularly around Christmas).
The overlap is getting a little ridiculous, that is for sure. I think many to most of them could be folded into the Vintage Collection, or dropped altogether (the inferior and competing sculpts). I don't think anyone would complain if they were packing Stormtroopers, Spacetroopers, Hoth Rebels, Snowtroopers, Biker Scouts, etc. into the Vintage waves. Otherwise, dedicate the line (Legends) more fully to army builders or "ultimate" versions of the main characters that you want on the pegs all the time (the perfect place for VOTC/VTSC/Evolutions re-releases, as well as army builders).
As others mentioned, I think that the Clone Wars line has been handled pretty well. I can see where it would be frustrating for those ordering cases, since there is often only a handful of "new" figures and a bunch of repacks, but for a primarily "kids" line, I think it works well. I know our nephews each asked for one CW figure from us for Christmas, one Cad Bane and one Anakin. It was surprising how difficult it was to find a Anakin figure at retail around here at Christmastime. I could have found a Legends or maybe even Vintage collection version, but he wanted the animated one, and those were pretty well sold out at that time here. Those big heroes/villains (Anakin, Obi-Wan, Grievous, etc.) should pretty much always be there for the kiddos I think, whether it is in the CW line, or if they switched them into the Legends assortment (making it animated re-releases as suggested already).