Marymoore Park does not have reserved seating, from the shows I've been to in the past. It's a fantastic place to listen to some sweet chunes. The stage placement is such that near the back there is a Nice curve/hill surrounding the stage so if you need to sit your ass down you can do so freely and still have essentially "great seats".
Extremely unlikely that they do reserved seating for Robyn but I have definitely been to shows there with reserved seating. It's mostly stuff for old people.
It's not like there is a 0% chance of it happening but if you're looking for special guests Sasquatch really isn't the festival to go to. What's the biggest special guest they've had? Rainn Wilson introducing the National? The dude from Harvey Danger singing a song with Death Cab?
Nah, you can feel however you want, I can't blame you for being pissed about some of this stuff. I think a lot of it is an overreaction but that's not that big of a deal. The whole schedule thing though, it's clear it'll come out in the next day or two which means that it came out a whole 2 weeks earlier than Coachella's did. This shit will sort itself out.