The one with calves of steel from constantly running up and down the beach? I remember wondering how she must be in crazy good shape from that, lol.
As someone who gave a somewhat negative (but I feel fair) review, my experience wasn't too different from yours and I think my expectations were reasonable.
The frozen drinks were terrible (I switched to margaritas, like you switched, and it was fine, but I don't think expecting remotely decent frozen drinks is asking too much).
I wasn't impressed with the food and I like to eat so I was likely better off trying Paradise Beach like I am this summer but when I went to Nachi it was a last minute itinerary change and I had 2 days to book something, I had always heard great things about Nachi so quickly chose it. The quantity is on me, not them, I knew I was getting a 4-course menu. The quality, which is of course subjective, is on them. It was fine but not great, IMO (again, this is subjective).
The peacefulness aspect lived up to 100% of the hype. Could not have been a more relaxing atmosphere.
$69 isn't cheap for a Mexican Beach club, it's just reasonable for the market. Paradise Beach was $67 when I booked (think it's $68 now) and you trade off the peace and quiet for unlimited food with more options and what appears to be more drink options. I don't think the CocoCay Beach Club is an apples to apples comparison. I just mention this b/c I don't think the price should excuse any lack in quality of food or drink. I wasn't looking for top shelf mixed drinks or 5-star cuisine. I went to a small AI beach club in Costa Maya years ago that didn't look very nice and the food was amazing!
We did this on the way there but went back on our own as our new friends wanted to stay longer than we did. I agree there's no point in complaining about the cab fares... they are what they are and don't reflect on Nachi.