Koa'ki Meiru is getting popular in Legend not because it is unbeatable, but because it is FAST. If you are busy in real life but still want to play Duel Links, you will need a fast deck. Unlike Slowbook or stall deck whose players have no life outside Duel Links
It's just because people are sheep. Nobody gave a f-ing thing about them last year but when a broken card like diamond (note, in duel links) pops up, everybody jumps on the bandwagon. Don't tell people the reason is time. U guys just want an easy kog title. Smh.
I dont understand your thoughts. If someone is busy and play koaki meiru because is FAST, that means those ppl think this game is a work and they need finish fast(with no fun)... so, they really have a life outside duel links?
PS. i'm not in favor of spellbook, that deck is annoying...