Gut feel form someone who used to have an "underpowered" boat (SR4/ 25HP) I also found the tabs did nothing.
Lower pitched prop will definiely help, BUT what about your top speed & max RPM?
Bottom line is - what do you use it for? - Cruising you are likely better sticking with "forever to plane" - as once on the plane you will be so much more appreciative of the speed / lower RPM.
If, however ytou are using it as a rescue boat, yes, reducing the time to plane will likely be more beneficial, as you only spend relatively short times flat out.
And if you do both? - Have 2 props & change to suit!
Wot Prop you got now? depending if you have a Yam or Merc respray I might have one you could borrow to test with....