Barthian Actualism in 5 steps

Okay theologian friends, here is my summary of the logic involved in affirming actualistic theology. I've used Nimmo (Being in Action plus his article in the Westminster Handbook to Karl Barth) in the main.

A) is this broadly correct? and
B) if you think this is a faulty theological vision, where does it go wrong?

Actualism, in a nutshell, "conceives of God and Jesus Christ, and (derivatively) of human beings, as beings-in-action" (Nimmo). To get there, it argues (while not pinning anything on the numbering which, to an extent, artificially separates united points):

1. God is who he is in revelation
2.a. This revelation involves events, acts
2.b. This divine "eventfulness" specifically has the name "Jesus"
3.a. So God's being is eventful, active, being-in-action
3.b. As the elect one, and electing God, this divine being-in-action names the event in which God elects to be God for us, and in do doing constitutes himself - his own being - in terms of this particular grace and love.

But actualistic ontology is a christological vision for all of theology, so:

4. This further entails that actualistic theology frames and structures anthropology (which for Barth derives from Christology) —we too are beings-in-action— and thus Barth's theological ethics. It also has ramifications for proclamation and Scripture becoming the Word of God, and the being-in-action of the church.
5. This is to say that actualistic theology resists any being-not-in-action, anything "static", whether it be speech about God, humans, or whatever else. It involves a "Nein", in other words, to substantialistic theology "in which God and human beings would be construed as fixed and determinate quantities in a certain abstraction from their histories, acts, and relationships" (Nimmo in The Westminster Handbook)