100% this. I'm a regular at Sam's and as such feel somewhat protective of it. People need to keep in mind that it is a hotel bar and not a standalone joint. Those who have complained about size need to keep that in mind, and that also like any other Disney attraction, you have to figure out when the good and bad times are to be there. I've been there plenty of times were the crowds were low or I had the place all to myself (at opening or as a hotel guest.)
When you increase the size of Sam's you HAVE to put in just as much attention to detail as you do over in CA. This ranges from the quality of the bartenders (who on average can make you many detailed tiki drinks and are very knowledgable/wide-ranged), to the prop design, to the drinks. Tambu Lounge does NOT make a mai tai - far from the real thing. Now while an official drink recipe guide will be sent over and essentially solve that problem, you gotta employ people who live the life and are a part of the culture - which many of the bartenders at Sam's are, meaning you'll find them at places like Don the Beachcomber's or craft cocktail lounges.
So when you make Sam's a monstrosity in terms of size, I believe you'll also get a proportionate decrease of authenticity and quality.