I am a musical guy, and I crapped out on Hamilton maybe third song in. I will grant that it’s fresh (or it was in 2015, at least), but it simply didn’t grab me, probably for the reasons you list out here.
I can’t imagine how awful it would have been had I dropped a couple hundred bucks for a seat in the back of the theater just to hear words bouncing all over the place due to imperfect acoustics. Spam-a-lot was that for me, and Hamilton is twice or three times faster.