I sadly never got to experience those attractions in their original form. Blame my parents. They never took me to WDW. My first visit was in 2010, well into adulthood, and I actually enjoy both rides. I didn't know I was supposed to hate/skip them until I discovered this forum 2 years ago. Too late I guess.
I'll reserve my judgement until I get off the boat once it's open.
And as I found with SDMT, it's actually nice to head to a new attraction that's panned here before it opens (kiddie coaster, shortened track, Lackluster AAs) because you have really low expectations. And then you go and ride it, like I did Sunday and am just blown away.