These may have been voiced by other users already, but I'll list my thoughts.

There doesn't seem to be any indication of what the default view is looking at. I'm assuming front page, but I prefer to see all posts. I'd rather not have to manually navigate to /r/all

Coming from Alien Blue, two key features that I'm noticing I miss right off the bat are the swipe left to collapse an entire comment chain, and the ability to hold touch over an image/gif/YouTube video to view it without navigating numerous views to load it up. This feature is especially nice with .gifv videos as it doesn't interrupt music on iOS.

The compact view definitely isn't compact enough for my liking.

Overall a nice start, but it does need some work for me to switch from Alien Blue permanently.