I didn't get the appeal of the comic, it seemed clear that Superman established and for a long time ran an authoritarian state, in pretty brutal ways, and that Batman long thought that and at the end one particular comment makes Superman realize that he has, it's true and that's bad ...
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Also making Lex a Bad Evil American Capitalist felt OK but unimpressive, very basic, reversal of that '50s comics/culture demonized Soviet Communists (though weird though kind of interesting that he sort of redeems himself near the end) and it felt disappointing that the comic never went into, as you hoped and thought it would, discovering and reacting to that Superman was an alien (or more wondering about why or how else he had superpowers) and he ultimately wasn't.