I couldn't agree with you more regarding the original Frozen. The movie touched me in a way that no other has in a very long time.
The first 1/3 of the movie set the relationship between Anna and Elsa so well. The "Do You Want to Build a Snowman" sequence was both touching and heartbreaking, and "For the First Time in Forever" perfectly conveyed the contrast between the two sisters, with Anna totally elated at the prospect of opening the gates and possibly even meeting her true love, and Elsa completely frozen with fear, terrified that someone would discover her secret. The coronation scene was also amazing, as the close bond between the sisters was unmistakable, even after 13 years apart.
I can't say I was completely thrilled with Frozen 2, mainly because I didn't like the ending, which I feel has somewhat damaged the franchise, but I did enjoy most of the movie.