Well it didn't work for me. These Klingons were supposed to be traditionalists. They had a fleet. It was dishonorable.
As to the other stuff I'm not buying that either. The plan was capture not kill and what were like four klingons doing on the bridge? It was huge, shouldn't there have been more? Reminded me of Nemesis. Huge Reman ship almost totally empty.
I think different Klingons have different concepts of honor and for these Klingons starting a war and uniting the Houses is more important then fighting fair.
Even how people on Earth who have the same culture or religion, act very different from each other, I think this is realistic.