I am assuming the shirt is light blue and not white, correct? If so I like it and don't think it's too matchy. It could perhaps use some patterns to give the look a little more life, perhaps a candy striped shirt would work here? Also, I can only second Stitches comment that the fit would look much better with the jacket buttoned.
Thanks! It's good to see you're back again! I'm a little surprised it isn't too matchy, but now that I look back on it, a closed jacket would certainly have helped to break it up.
Great look! What fabric are the trousers?