I agree with you in general, except this part. Yes, romantica can be fine, but the type of romantica is important; it needs to fit casino (such as Es Tu Mirada by Leoni Torres or some HDP). Rey Ruiz does not fit the style of dance and is trying to fit a square peg into a round hole. Your idea of authenticity is also dubious. Should Calle Real not be played at Cuban Salsa events because it's a Swedish band? Should Mayimbe not be played because the band is from Peru? Rey Ruiz being from Cuba doesn't make his sound any more authentic in terms of music choice. He is a data point for sure, but we should take into account that his target audience is linear dancers! Meanwhile, Mayimbe and Calle Real are not from Cuba but make music for dancers of this style. My point was this: I put him in the "Salsa from Cuba" because this is clearly where he belongs, music geared toward the linear/Miami traditions. And while I'm glad so many people here like to dance to it, it's just not good for casino and I don't think casineros would enjoy widening their repertoire for music that clearly doesn't fit their dancing style.