Agree. I don't have any problems whatsoever. The Bluetooth problem was solved with the May update.
eg. The SD storage problem: Go to Settings, System, About phone, Build-number. Tap 7 times on build-number. Activate Developer options.
Go back to System. Tap Developer options. Go to Allow Apps Force External storage. (Don't know the exact English sentence). Now you can eg. in the camera app choose SD Storage as setting.
It's hidden, but possible.
except, what you're describing creates a lot of compatibility issues, really not recommended, adopatable storage needs to be officially supported