I think we could also agree that the Church is sacramental in a qualified sense, but it isn't strictly a sacrament as we understand it. Orthodox do not distinguish between something being a sacrament, and being sacramental, but Lutherans do. Sacraments apply the grace of justification to us (forgiveness of sins and eternal life), and are the ordinary means of doing so, promised by Jesus Christ himself. Something that is sacramental pertains to sanctification, but not necessarily justification, and it doesn't have the sort of divine promise attached to it that the sacraments do.
I've begun reading Jordan Cooper's book,
Christification: A Lutheran Approach to Theosis https://www.amazon.com/Christificat...id=1515246896&sr=8-1&keywords=christification and hopefully I'll be able to say something meaningful about theosis in a few days, and open another topic. I've only watched a few youtube videos of Jordan Cooper discuss the topic in the past, and I wanted to deal with the issue more in depth.
Another thing to consider is that David Wagschal is reflecting a school of theology called Radical Lutheranism. This is a significant and influential school in our tradition, but it's just one possible interpretation. It does state alot that is true, but I don't think it's all that could be said about what salvation means. The good part of Radical Lutheranism is to resist the moralism present in much of mainline Protestantism, which is a sore temptation that Evangelical Lutherans have always faced, especially America, in a culture that so naturally gravitates towards self-sufficiency and moralistic sentiments.