I find Impact bubble chart very useful to show the dynamics of change. However to be fully useful it should have the following options like customization of axis scale (thousands, millions, etc.), axis format (number/percentage), colour of bubbles to be set by name of the category, so we can easier track evolution of a specific category. It also seems not to handle properly time dimensions: custom time dimensions do not appear in correct order or full date format is shown just like "G".
Please, improve the visual in a way to be more attractive