I second this request/post! We need to be able to transform symbols with proper translation, rotation, scaling and flipping behavior. When a transform is applied to the symbol (parent), all the (child) objects inside should transform and maintain their spacial relationships including text objects.
Adobe Edge Animate does this beautifully even when embedding symbols within symbols using a transform tool designed to accomplish this behavior. Transforming the parent symbol does not create individual keyframes on child objects when creating animation. It just works the way you would expect.
The downside of Adobe, is that they don’t make it available outside a $50/month subscription.