But the first part of this article, also cited in the convention resolution, is that the LCMS has as one of its objectives to "encourage congregations to strive for uniformity in church practice." This would be Art III 7a.
Cultivating "diversity" and "choices" and "styles" reinforces a tension between variety and uniformity that need not be. Instead, if we are serious about responsible practices which are in harmony with our common profession of faith, I submit that we should instead speak about the "breadth" of the Divine Service, the "depth" of the Divine Service, and even the "height" of the Divine Service.
Were we to do that, we would maintain the focus on the uniformity we are constituted to strive for, and also embrace the various practices and customs that are a legitimate and responsible part of our living heritage. "Breadth" would acknowledge the various languages and cultural situations in which worship occurs. "Depth" would encompass the variety that is provided for within the rubrics - just as a basic dance such as a waltz can be simple or elaborate and still be a waltz. And "Height" would embrace the arts in service of the Gospel.
Height. Breadth. Depth. Of Christ. For us. Just as in the wonderful hymn "O Love, How Deep". Just as the Scriptures speak (Eph 3):
14 For this reason I bow my knees before the Father, 15 from whom every family  in heaven and on earth is named, 16 that according to the riches of his glory he may grant you to be strengthened with power through his Spirit in your inner being, 17 so that Christ may dwell in your hearts through faith—that you, being rooted and grounded in love, 18 may have strength to comprehend with all the saints what is the breadth and length and height and depth, 19 and to know the love of Christ that surpasses knowledge, that you may be filled with all the fullness of God.
Isn't this what worship is all about?