I have a couple of points as a user who has not tried the 8.1 developer preview. Your feedback is welcome...
1) Applications in the Store are receiving bad feedback for not working in 8.1. This is reducing their overall rating and in my opinion isn't acceptable. The point of the developer preview is to allow app developers to prepare their app in time for the official release of 8.1. Unfortunately as the developer preview has been opened up to the masses it seems that it has allowed users to simply complain about apps not functioning correctly from Day 1 of the preview release. Time has passed now and I agree most apps should be near completion but my point is still valid...
2) Lots of users have pinned issues on the OS instead of the firmware. On a side note I like many others was quite surprised to see so many bugs in the OS especially over different devices. Perhaps Microsoft had to meet a deadline or they were pressurised in to releasing it so quickly by the masses, we'll never know. The preview only contains low-level firmware to get the relevant hardware (Camera, Wi-Fi) working correctly. Without the full firmware we've seen many camera, Wi-Fi and battery drain issues. I think this could have been made more clearer on installation of the preview knowing that the preview would be downloaded by your average and less than average Joe.
Thoughts?