I try to push individually portioned meals whenever possible because it's easier to make them more visually appealing. I also don't do frozen meals. It destroys the presentation regardless of what it looks like going into the freezer. It's a pretty tall task to make a single component visually interesting. One way is to prepare several components family style in the same container. For example, line some Basmati rice pilaf down the outside edges of a large glass dish, line inside that with steamed broccoli, coat the bottom of the container with a raspberry pale ale mustard sauce, then top with a single line of peppercorn crusted chicken breasts. It's just like plating a large version of an individual meal. The struggle is getting all components of the dish to reheat in the same amount of time in the same dish.
One thing you could think about instead of lamenting how to make a single package of prepared chicken breasts look appealing would be to make your packaging itself more colorful or appealing. There is only so much you can do with a single component in a container.