I think the case is good, I want to put the best foot forward because I don't want to be one of the 20-25% denials hehe.
As for why the K1.
Everyone has a host of different reasons for choosing a visa type. To be honest, for me, time is the single most important thing. Money, I have. I don't want her to work anyway so that is not an issue. Not being able to travel out of the country for a period of time is not great but not as significant as the other reasons. Getting married in Ukraine is not feasible for us and more difficult as well.
We have spent a lot of time deciding priorities.