Changing icon sizes

Hello, I'm having an issue with the icon sizes of the panel. To give some context my arrangement looks like this:

As you can see it's very Windows-like and I'm trying to make it closer to the configuration I had in Windows 7... The problem is I can't change icon sizes in a satisfactory manner; if I change the row size of the panel all icons are enlarged except the window buttons (tasklist) which are stuck at 16px when showing labels. Also the notification area (tray) icons increase the spacing between them even though their size/spacing is controlled separately.

What I'm asking for here is a way to control each "element" of the panel separately, for example I want the Whisker Menu icon to be 32px, the window buttons to be 24px, and the tray+power manager+show desktop to be 16px. The panel would resize to the height of the tallest item and center the rest vertically without changing anything else.

Thank you.