I agree, the amount of time this took was just silly. I think they announced it way too early which made it even more painful. I have never seen the movie so not thrilled about the IP, but I have never seen mummy and love that ride. So IP is not everything to me.
The thing about riding a dragon vs. Benched seats is capacity. We would have little to no capacity with the RVs recommended here. AK and this land needs capacity. It is why we are on a bench in FJ and not individual brooms. Wouldn't it be way cooler to be on a broom really flying? Of course, but it just wouldn't work.
When was the last Kong movie? How does it trend on google? Yet, aren't we all excited and think it will boost attendance? So if parks only built stuff on Google trends we would not get cool stuff like Kong, not every IP is going to be HP. Star wars and HP are at the top and no IP is going to come close to them, it doesn't mean parks should never build any other IP.
I really think Avatar will do well, will bump attendance a good bit, and really make AK a full day park. Now do I think it will be best thing ever created or will be created? No. But it will be awesome and something many people, including myself will be flocking to see. And not just pixie dusters, this will go over well with the GP.
Last thought, I think Disney is filling huge holes with the stuff added in 2016 and Avatar. These holes needed filling and for once they are actually doing it. I feel AK will be fixed with these additions. Now I hope they don't sit on their hands and do nothing for 10 years, but I do think this fixes all the major holes this park had. For once Disney did something right. It may have taken way too friggin long, but when done will be what AK needed.