Why when you can probably get cheap Clones on the secondary market for less than $5-$6 a pop? Know what I mean?
Here's my take on this now that the dust has settled...
At $5-$6 each, I think the concept is fairly sound... I think the sculpts aren't as nice as they could be at that price, and frankly look a little like smaller versions of the 12" figures they're cranking out... This actually jives with something we've heard 'round these parts recently, actually.

The lowered articulation on the figures sucks only from the standpoint that they're really sub-par quality. I don't need SA on everything, but better than that is possible even for $6 I think... at least waist joints and skirt pieces, but whatever really. It is a kid's line and so I'm not bothered by it too much... A cheap sub-line will help finance the collector line, just as LEgends/Clone Wars ultimately did for a while before, or Collection 1/2 have done in the past. The sybiotic relationship continues I guess.
These aren't anything I'm likely to buy unless, and honestly I hope it doesn't happen at all, they somehow slipped all new secondary characters in that I wanted. I doubt that occurs, as most of these I have a vastly superior version soemwhere in my collection already. Why care right? But I could see something sneaking in and making me cave...
And even then, at the price, I won't be too mad. I'd be more annoyed that it's a figure I want, but it was executed poorly because I think some of those sculpts are so-so at best.
The only other reason I'd buy, some of them look like ok fodder, but $6 fodder isn't worth it these days. These aren't for me, and I'm happy with what we have in the main line. WIsh we'd see it come down to $8-$9 and cut back on EVERY figure being Super Articulated (yeah, that's ME of all people saying this). Ditch ankle joints on anything but troops and "heroes". Even SOME secondary troops could do without just sculpt the foot/ankle neutral (no walking pose ankles... looking at you, Training Clone). Ditch the more complex ball-jointed torso almost all together at this point... It's great on some of the armored guys but really not needed anymore.
Either way, Legends hasn't really been my cup of tea since 2007 when I was almost all-in on it. A grand time that was... not financially though, as those years were costly from actually wanting to throw my money at Hasbro for all the greatness they put out.
Now, Legends is just easily skipped but I hope it's good for kids because kids make our collecting lives easier and more fun ultimately.