I'm hoping someone on the devteam can tell us the current names of some of the features we saw.
What is the name of the cottage in the Heartlands where Quicksand can be found southwest of Midway Village?
At this point, it is simply known as the Cottage. That designation may or may not change somewhere down the road.
What is the name of Foreshadow's "retreat" south of Midway Village?
Foreshadow's location is known as the Hermit's Cottage.
What is the name of the new structure northwest of Midway Village? (The one that looks like a birdhouse tower. Some of the design suggests griffins.)
I believe the current designation for that structure is the Roost, but someone from our Design team might have a better answer for that one as it is still a work in progress.
What is the name of the platforms south of the airship dock in Cloudopolis? (And were they new in OSE 10?)
That platform area is currently known as the Drop Platform.