I agree about the not to worry reference.
Our heavenly father knows that we need certain things to survive and even thrive, such as clothing, food, shelter, etc. My contention is that these seemingly small things are indeed most important in the eyes of God.
The prodigal son reference is that it is indeed appropriate, at given times, to dress accordingly.
As I said in a previous comment, I have never said that it is not important in the eyes of God, in fact as you have said, there are certain occasions and places in which one has to be dressed according to the occasion. I said that too.
The only thing I have said since the first comment I made, is that I do not believe that the way you dress to go to he church has more importance in the eyes of God than what you carry in your heart in church.