Very good point, it is busy and it's something I'm going to have to think about. It might work better as cab art, but I am still considering using the surrounds and still using it. I'll have to think about it.. but if I do use this I was thinking of putting the trackball right in that empty spot next to the piranha plant. To make it fit I would have to increase the size of the image and probably cut out some of the sides. Here are the specs on the control panel I ordered.
* Control panel is 35" wide and 18" deep.
* Panel base is 5.75" tall facing the video source and slopes down to 5" facing the player.
* This 2 player control panel blank can be customized by you at no extra charge! You just tell us what you want and we will build it!
and here's a pic of how it should look

I am still customizing the button layout (i'm waiting for a draft from the seller). I was thinking of going with 8 buttons japanese style layout, but now that I see your image I might go for what you designed here (it's a neogeo and capcom combined layout right?). If you have any suggestions here is the typical layout this panel usually comes with.
* The standard controls setup can be 6-7 player buttons for players 1/2, dedicated pause, escape and player 1/2 start and credit buttons. A total of 7 pinball buttons, 3 on each side and a front shooter/plunger button. 2-3 mouse buttons. Panel is fully t-molded on the base ends and the control panel top edge. We use black leatherette t-molding at 7/8" tall with an offset slot cut so the t-molding rises above the panels top surface. This allows you to have a custom CNC cut plexi top that ends up flush on its edges with the t-molding! No unsightly bolts or screws need to hold down your plexi!