i also have all three of these issues since 5.0.0.61. i never do OTA upgrading, i always do a fresh install. these issues are all new, or much worse, since 4.6.
for #2, it happens every time i connect and then disconnect wifi. appsupport will have no connectivity as soon as the wifi is unavailable. restarting appsupport + ofono fixes it, and nothing else does.
i set up a shortcut to disable-wifi + restart-ad + restart-ofono. i triple click the camera button to do this, basically every time i leave my house.
i hate to say it, but it really does seem like connectivity only ever gets worse on sailfish.