I fully agree with NHC that there is enough evidence to classify the system as 'Gamma'... my main concern is that the intensity forecast is over-aggressive. 55 kts is possible, but it does not seem like the most likely scenario. A lot depends on how much the system winds up before turning NE, if it does at all. If it is well-organized at that point, baroclinic factors may help it intensify or maintain its intensity, but if it remains a broad low, or if it ends up making landfall on the Yucutan, then it could just as easily be a depression or open wave in 72 hours.

NHC is the best in the business, though, and most of the time I second-guess their forecasts, I end up being wrong.