Seeing the shape is a symbol, any change you make to one of the symbols will be done to all the elements. Editing and altering should be very easy. Add more lines, shapes, or text to the design to ‘grow it’ outwards.
I added a gradient overlay FX to the layer containing the design for a bit of extra polish.
I prefer to work with layers rather than groups because it feels easier and faster. It allows me to select each element with a click instead of CTRL-click [as the click would select the group].