I’d be really interested to know why opinions of the park are so low;
I'll chime in on this one. I'd describe the opinions on KI to be more "polarizing" than necessarily 'low', in that yes, for as many people that consider it to be one of their least favorite parks, there are a lot who consider it one of their favorite parks.
And I'd say that has to do with their polarizing headlining coaster selection. A lot hinges on how much you like Diamondback, Beast, and Banshee (whereas MT is pretty universally liked).
For every person that ranks Banshee as one of the worst, if not worst B&M inverts, there are about as many that have it as one of their favorite, if not favorite B&M invert.
Similar story for DB. I've seen it rank very highly on people's B&M hyper list but also very lowly - mostly contingent on how much, if at all the rattle and/or trim affected their opinion of the ride
Then there's the Beast, which many don't particularly care for, but some who have it one of their favorite coasters in general.
Therefore, if you love all of Diamondback, Banshee, Beast, and Mystic Timbers, (such as myself), and like some of their supporting coasters as well, then it is a great lineup. But if you have a disliking for some or all of those rides, and don't care for any of the minor coasters, then you're probably not going to like KI very much.
I know I'm speaking with a bias here, but to me KI is a great park. No we don't really have that slam-dunk top 10 or even top 25 coaster yet, but a very solid all-around lineup nonetheless.
Orion will be the closest thing we have that true destination coaster that we've been lacking, and I'm optimistic it can exceed the (admittedly, low) expectations. Counting the days to when I can try it out and put all of my preconceptions and speculation to rest.