To be fair, there are still buildings & utilities easily visible throughout Hagrid's... both onboard and offride.
As for HTTYD coaster, as of right the backside of Mead Hall will be quite easily seen on the ride, similar to how you see a few BoH buildings on Slinky Dog. It's just for a few seconds, not the end of the world, but it's annoying they couldn't add more scenery to block (like the giant fence).
I do think this park will offer the strongest collection of rides, but thematically it's far from the level of Animal Kingdom or DisneySea.