I can understand how it could turn out to be overhyped, but I'll say that if we get everything Disney is promising us that it won't disappoint. They seem to be making a point to have theming and characters in every part of the land, which would mean only 2 rides could still be enough. If the actual area turns out to look just like the model we've seen and matches the CGI version seen in the Star Tours scene, I think it will be satisfying.
I will add that I have been a huge SW fan for years, and I too am a little disappointed in the reliance on the newer films, and not having the Rebellion and original stormtroopers, etc. But I also understand why they did it,
I would say that SWGE could be an even bigger draw than Harry Potter thanks to a -- what I believe is -- more rabid fandom, and one that stretches over decades. I enjoyed the Harry Potter movies, but I still think those fans skew younger, whereas SW has been a big part of the lives of people in their 40s, 50s and older.