"I don't quite see how you read this to say that the Norwegian Union is threatening to secede from the SDA church. They are enumerating possible outcomes."

Loren, the implications are obvious. You don't state the possible outcome in this context without it being a "threat" as a possible option they would exercise if the situation was such as it demanded this option.

God has used the SDA church for His intended purpose and had  the church remained loyal to God's intended goal, it could have been what God intended from the start.

That's not possible now. The early church could have been the only church, but adopted Sunday and dis-qualified itself with no possibility of turning back.

The SDA church adopted and endorsed WO and now there is no turning back. It is simply not possible. How long God can still use this instrumentality is unknown. Just like the early church still taught some gospel and people were converted. But the die is cast. No turning back now. Too late.