I know this is very early, but here goes:
I think dragon riding is very fun for races (the best non-raid content of the expansion easily), but should stay out of any and all “active combat content”. I thought that about Nokhud Offensive’s dragon riding between areas, and I think it’ll be even worse during the raid boss.
There’s obviously accessibility concerns that I’ll let other people who know them better bring up, as it’s not something I can really speak on. (see this other CC thread already: Blind accessability, dragon riding in the new raid)
The main issue I see with the idea of a boss fight using it is that it’s a vehicle phase wearing a fake moustache and sunglasses
Those just straight up aren’t fun. When I enter a raid and fight a boss, I’m there to do so playing my character and spec. Reducing that down to 6(?) buttons, most of which likely won’t actually get used, even for an intermission, is not what I signed up for.
I assume this is meant as a throwback to Alysrazor in Firelands (and to some extent Blackwater Behemoth in Eternal Palace), or maybe Malygos/The Oculus (which would be odd considering how generally unpopular those were).
The big difference between a dragon riding phase and Alysrazor is that in the latter case, I’m actively playing my character the entire time. I’m doing my rotation, using defensive cooldowns etc. I feel like I’m a Shadow Priest (or Balance Druid at the time), I’m not playing the same thing as the other 19 people.
My character got powered up by doing fairly simple flying that was essentially adding the Z axis as an extra movement option. It felt cool because it was additive to the things I would usually be doing, rather than replacing them.
Blackwater Behemoth was essentially the same as Alysrazor except without the powering up and instead with a tedious “swim between platforms” intermission. The swimming/Z axis was additive to regular play.
So yeah, please don’t make a dragon riding boss. If there has to be dragon riding, do it during the trash.