Agreed. A bit more on two of the performances you mention: Jackson is the heart of this production. He sings so, so beautifully, and plays Georges with so much restraint. He's the best thing in this production by a mile and his "Song of the Sand" was worth the price of admission by itself. And after watching him play straight in every other role I've seen him do, it was wonderful watching him play a role that allowed him to, for lack of a better word, butch it up less. Another positive: George Salazar, who is able to land every laugh in Jacob's arsenal, even with the production cutting the culmination of his arc (Jacob tripping and falling in his long-awaited La Cage debut was deemed too cruel, I suppose.)
Ryan J. Haddad, as Jean-Michel, also sings the role beautifully, but he is otherwise deeply miscast. This has nothing to do with the fact that he uses a walker - if anything his disability lent a certain amount of pathos to "With Anne on My Arm". But as delightful as I found his work in "Dark Disabled Stories", he is wildly unable to access any of the charm, heart, or fear that mitigates how awfully and selfishly Jean-Michel behaves in the show. If we don't believe that he is doing this out of desperation/panic/youthful blindness, he can come across like a monster. He came across like a monster.
The sheer amount of insane physical choices Michael McDonald makes as Didon must be seen to be believed. He and Nicole Parker are left to flail a bit as a deeply unfunny conception of their ensemble roles, the restaurant owners, as French-accented, very horny and deeply (deliberately) schticky, but when they come in as the Didons in Act Two, the production receives a jolt of well-needed energy. The petulant way he delivers the line "I don't much care for restaurant food", briefly devolving into a toddler while still maintaining a politician's dignity, was the biggest belly laugh of the entire production.