Hi Graham,
The bow being pushed down is a combination of the propshaft angle and the propchoice, if the props generate a fair amount of lift, changing them for props that have less lift will make a difference.
But the propshaft angle isn't that easy to change...
Judging by the pictures, the hull runs a tad wet, or it runs at that speed where the steps are about to level out the hull after which it'll run quicker and the transom gets up more, but I'd have to see some running video to be able to confirm or deny that.
Regards, Jan.