The odd thing about those Walmart exclusives is that they were really hard to find around here. Of the 6 Walmart stores I searched, I only found them in one and it was by accident, I stopped during my lunch break while I was on the road for work. I bought all three and was glad I did, because I've only seen them once since then, in PA, and they didn't have the Ewoks. The Amanin is an excellent figure and even though Sunber is kind of terrible, it was well worth it for the one figure alone. The two Pilots also, IMO, were great additions to the line but you're right, it was pilot overkill for the last year or more.
There was a pretty vocal minority that wanted more Rebel pilots, unfortunately it's all on Hasbro for overdoing it. The comic packs were perfect for the Rogue Squadron characters and 1 Battle Pack per year with more would have been fine, maybe 1 here or there in the basic line, but mix it up with A-Wing and B-Wing characters, not all X-Wing pilots. But the Evo sets really ruined a good thing.
I've had a problem with the Evo sets for a couple years now anyway, they got away from what I felt was their core and when they did, they became overpriced money grabs on Hasbro's part. I always felt that the Evo sets should show a true evolution of a character (more so than a theme) and that they should be best-of-the-best as far as sculpt or accessories go. The Clone to Stormtrooper set, Anakin to Vader, even the Padme set, were excellent. But three pilots, all Rebels? That reused bodies and accessories? How is that an evolution of anything? Hasbro should have scrapped that line a while ago and put the characters that fit (like Darth Bane or Darth Nihilus) in comic packs where there could be media backstory for the characters.
Anyway, I've already said I blame most of this line's failure on Hasbro and for good or bad, there's not really anything that could change my opinion on that.