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Hello an welcome photobyTVince, like already mentioned although technically correct (exposure-focus and such) There is a lot of "dead space" on the left, which doesn't bring a lot of useful information. I can also understand the question about the Brenizer effect, because as it appears now with the shallow DOF, it makes the subjects look even smaller almost as if the were little plastic figurines.
Now i must say it is and interesting effect and if this is what you were going for well you've achieved your goal. But if it was not, if you were looking to create more of an isolation effect of you subject in a big (overwhelming) surrounding then indeed there are better visual was of going about this. Namely positioning your subjects closer to the lens, trying to get a less busy background instead of trees-fence and parts of building which detract the attention from your models. As shot your subjects are placed in the 7/8th of the image and in photography as well as most visual art forms it is always better to apply the 1/3rd rule. Dividing your composition in 3 equal parts both horizontally and vertically and place the main point of interest on one of the intersecting lines of the 1/3rd division.
These rules of composition come to us as far back as the Greek antiquity. But like i said it is a good picture photographically speaking, just needs a little "artistic" tweaking in my opinion. Keep posting and remember have fun experimenting and learning your craft :-)
More on the subject: http://en.wikipedia.org/wiki/Rule_of_thirds