SCOTT: And were the Klingons behind it, why didn't they give them breechloaders?
CHEKOV: Or machine guns?
UHURA: Or old-style hand lasers?
KIRK: I did not invite a debate. I'm sorry. I'm worried about Spock and concerned about what's happened to something I once knew down there. You have the conn, Scotty. I'll be in Sickbay
My question: why didn't they? What was their goal anyway (beyond bringing the planet into their Empire)?
We know Krell chooses the 'gradual updates' route, but why? Did he want to 'train' the villagers in the use of gradually more powerful weapons, to make 'good klingons' out of them? Did they hope to avoid attention from other major powers this way? Or was he a trader somehow, one that would earn much more money this way than giving the best weapons immediately? (that would be very un- Klingon). Some other reason?