This past Sunday's sermon was reviewed on KFUO's Issues, Etc. yesterday. You can listen here:
I found out about it at Bible Class last night! Pastor Wilken commented specifically about the ending - how it didn't put you back under the law - and I certainly hope that it didn't. What I'd suggest was the basic pattern of the sermon was: Law/Gospel/Mysical Union. A rather typical approach for me.
I think the mystical union is simply the key ingredient that is too often missing in homilies. It's how the life described BY the law comes to be LIVED by the Christian - that is, by faith's union with Jesus Christ. "That Christ be formed in you" was the Apostle's way of putting it. I'd argue that it gives you what folks concerned about third use are looking for, but does so without the impression of being left "under law." It also then is something different than the generic: "so come receive the Eucharist." Thoughts?