Not sure how much of that is probably hardcoded into game, so the first one might not be possibe. A 2da file can be altered to give more K1 powers/feats per level. So, even if K1 is capped at lvl 20, more powers/feats per lvl-up can be obtained by altering the 2da files (or just using KSE, though that pulls you out of the flow of the game). That really only leaves custom feats or powers, some of which already exist in available mods.
Now, I want you to remember that no bastard ever won a war by dying for his country. He won it by making the other poor, dumb bastard die for his country.---Patton
There is no room in this country for hyphenated Americanism.---Teddy Roosevelt
I never forget a face, but in your case I'll make an exception.---Groucho
And if you all get killed, I'll piss on your graves.---Shaman Urdnot
How would you like to own a little bit of my foot in your ass.---Red Foreman