The impression I get from the two released screenshots, especially the outdoor one, is that they are just in-engine conceptualisations. I mean, that amount of foliage is not very practical when you start thinking about character collision and camera. The trees don't look functional/climbable (not that they have to be) but I think Playtonic are just giving us an impression, not actual level designs. They are probably many months away from having final level designs (and remember, as ex-Rare guys they will probable scrap an redo a lot of versions to hone in on greatness!). I think this game is still figuring itself out, but there's no problem with that, and it's great they're listening to their fans during this process.
Right now Playtonic is probably on cloud nine, but also kind of freaking out about how high/unreasonable fans' expectations can be. They have a great track record, but so did the ex-Rare guys that made that FPS Haze...they are still humans after all. They don't have a fool-proof formula for making classics. I just hope there isn't any serious backlash from the community/Kickstarter at some point because Playtonic don't deserve it, even if the game somehow turns out to be "meh". I mean they did make Nuts & Bolts
(I don't think that game is bad, but it felt half-baked).
Anyway, I'm giving them the benefit of the doubt. Their game is at least a year away at this point, realistically 2 years if I had to guess. Satisfying people's nostalgia is tricky, and often a fool's errand, but I support Playtonic just for who they are and the spirit they embody going forward.