I saw the show in Boston, and despite some of the issues, it was still a lot of fun. Having some time to reminisce, here are the main changes I think the show needs:
(1) Re-institute "Come What May" as THE song. While "Your Song" may be more popular, the fact is anyone who has seen the movie, this change is just too jarring. Come What May should be THE song.
(2) As previously said, there are a few musical #s which should be dropped. (Some of them previously mentioned). We all know we are going to see a jukebox musical. But when the audience is guessing the next song from the cheesy dialog and the song seems totally out of place, it just takes you out of the show. This is usually not the case, but there definitely were one or two songs where the audience is like "come on! are you kidding me?"
(3) Well I guess nothing has been done with the leads. And no offense to the Aaron or Karen (who are fine actors in their own right) but they just had very little chemistry. Perhaps it is the fault of the book for not showing us why they fall in love. But it just never seems like it is earned. And that is perhaps the plays biggest downfall.
Don't mean to sound negative, the show was a lot of fun and the sets are amazing. These are just some changes I hope to see them make to improve the show.