Instead of being disappointed that MO wasn't up to the standard we were hoping for, why not look at this from the point of view that these concepts can be put to use in a future game (Munch's Exoddus perhaps)?
I think everyone who has seen the original concept videos agrees that would have been a great game, and I see no reason why something like that could not be created today (save for time and resources- and at least we know time isn't a factor anymore

)
I think these concepts give JAW a great blueprint on how to approach a future full-3D Oddworld game (non-Stranger). Until JAW explicitly state that these concepts will never materialise, there is still the possibility (and given the acclaim from fans, dare I say likelihood) that at some point in the future the concepts will make it into a game.