Ok fellow sewers (that always looks wrong to me), what should I do here?

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Normally this dress would be lined and I wouldn’t have to worry about how to finish the straps but I didn’t have enough of either fabric to line it so I decided to finish the edges with bias tape that I made.  I originally thought I’d sew the straps closed and cut a V into the neck and finish it with a tie closure.  But, the straps don’t really lend themselves to that application.  Here’s an idea that I did to one strap but I’m not loving it.  It just looks unfinished to me.

The straps close with a button.  So, any thoughts on how I should go about finishing these straps?  Thanks!