Pretty much every review of Legion Lost I read(ComicsAlliance, IGN, CBR, ComicsBeat, etc) has talked about the book feeling rushed and non-new reader friendly. That doesn't mean that applies to EVERYBODY, but it is a complaint that is coming up constantly towards the book, so its not just CA people being lazy or whatever.
Sometimes, all you need to say is the book is "perfectly decent". The artwork is clear, the storytelling serviciable, the set-up adaquetely explained, the boxes get checked off. Its not that bad, but its not that good either so...decent. What more is there to say? It is the official Dan Jurgens comic criticism, as I always say.
The Superboy guy didn't think it was interesting. He didn't like this new take on Superboy, nor does he have to. Its hard to give a damn about a book if you don't care about the character or the plot, which he comments on. I like Action Comics, but it still doesn't feel much like Superman, with him looking like a hobo and torturing people. Having preferences in your favorite characters isn't some crime; you just seen how the internet reacted when Amanda Waller physique changed.
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You know who's sexy? Black Turtle, the 2010 Games Contest Guru Winner, that's who!