Your Ork has to get physically bigger as you gain XP. But every ork needs trophies, and every boss needs a pole
Personally, I think a bosspole with a functional Striking Scorpion aspect helm would be a great trophy to wear. Not that mandiblasters would be a ton of use to an ork, just one more bit of dakka.
Oh yeah, there's two things every ork needs... a cool, orky name, and hilarious dialogue. Hope names can have spaces and apostrophes and dashes. And a button made just so we can shout waaagh.
I want flash gits with weapons that are both deafening, but also spark and buck like a mother. I want choppa boyz with axes the size of small horses, killing indiscriminately. I want nobz stuffed into brobdignagian suits of mega armor, stomping and shooting across a field of bodies. I want A rIgHt An' PROPER WAAAGH!