Yeah, it was served this way when I had it at a later preview event (I had the alcoholic Green Milk). Definitely agree with the “runny and oily” comment in that blog post. The tequila just sort of sits there on top and it’s hard to really mix it around. So when you have a sip, prepare for the tequila.
I’m not familiar with Corazon Blanco tequila but I assume it’s a low/mid-market brand as it had that kind of harsh-ish taste (sorry to any fans!).
All of that being said - I usually prefer mixed when poured vs pre-mixed drinks any day, so this is probably a good thing.