Then the orks need a weapon that can kill vehicles that fast, no if, buts or maybes. Matches are won with vehicles and their control and currently orks can't compete.
First - I'd swap you a Zzzap gun for a melta any day of the week ya pointy eared grot! Second - No, you misunderstand, I'm happy for us to keep our current weapon set if our weapons actually can compete with yours at their intended tasks. Klaws should be able to a vehicle as quickly as a melta, if that is one of their main battlefield roles.
He's destroying immobile tanks at a fortress map where all the tanks arrive damaged and usually are under heavy weapons fire. I mean... meltas melt tanks fast, agree, but that video is a bit...manipulative. He destroys all the tanks at the same speed or faster than the tank he sticks a melta grenade! The difference here is that klaws/ power fists stuns vehicles and are formidable melee weapons too, while the melta are only useful for one thing. Indeed, what all the anti-vehicle weapons share is that they can also be used as specialized anti-infantry weapons, while a melta and a multimelta are awful vs anything that's not a vehicle. I play as a klaw ork as secondary character and I agree at the fact that their weakness is a lack of a fast vehicle-control weapon, but balancewise, klaws shouldn't be as effective as a melta. Give orks a melta grenades bundle, increase a bit the klaw vehicle damage or a add mekboys with saws, but only over-specialized weapons should be kings (or queens) at their role.
What are you talking about??? It's clearly seen on the video that first rhino for example was at full health! the rest of your post is just pointless now