While I don't agree with your take on things -- I think Myrellion's been a resounding success -- Uveto doesn't really have any "serious" aspects. There's no major, dark plotlines running in the background -- everything's pretty much front and center in the design doc. If you've got a direction you'd like to push the planet's design, I wholeheartedly suggest you comment the shit out of that doc.
I dunno, I feel that Myrellion is a good example of write team losing track of the game's theme and what they want out of it. What kind of game is TiTs? A porn one, obviously, but also an adventure one, in my eyes. We start at the rather weak planet of Mhen'ga, talking up the town in getting a variety of side quests before running the jungle loop to do them and eventually "complete" the world be getting to the end of one of the path loops. A basic romp, though there isn't much compelling the player forward other then that back of the mind "GET PROBE, YO" bit and how well that is really telegraphed or emphasized is questionable. In a way, it kind of makes me worried about your plans for a particular thing other then Uveto, given it's stop and go hop around nature.
Hop over to Tarkus! Well, actually it's the same sort of tune; run around the town and pick up... one sidequest, I think, then run around the place until you eventually find the end. You practically stumble across the Tether, to memory, with nothing prompting you that way and just a fit of whimsy to take you down it. Heck, you never even find the probe, Shekka just whips it out of no where after you complete the Tether, making it all feel kind of detached and just "yeah alright." Still, you're meandering around, finding stuff and doing something that qualifies as
ADVENTURE, even if it might not be
my ideal.
Then we roll into Myr which... isn't like the other two planets at all. More in common with the sex-sideshow of New Texas, really; a big town area, a bunch of NPC talking heads that tell you about what's going on, eventually you'll find the person who talks the bestest and nudge your way down into the brief dungeon area to complete the planet. While it's just as much rubbing your face into everything until something clicks and progression ensues, you're just talking to ant land and reading through everyone chattering and yammering on about it. They say how much of a bad time it is and the player is compelled to maybe try and solve it, unlike the lack of compulsions thus far and it's still not really in that Old Campy Star-Wars/etc Adventure the game tries to fit itself with.
Myrellion is deep! Ish! And it's such a stark contrast to everything else and does things very differently that it just doesn't feel right and makes it all kinda spastic.
Shit, then we hop to Uveto which presents new environmental challenges for all your
ADVENTURE needs and it's just a sideshow planet, too.
Dunno, man...