It took 2 sessions and a little over 6 hours, but I beat and unlocked every stage in Star Fox Zero so I feel like I can express how I felt about the experience. It took me a little over 3 hours to get to and beat Andross, which was to be expected. What I did not expect was that there was only 1 Andross fight, unlike Star Fox 64. From what I've read thee are 19 unique paths to Andross, but only 1 version, which I have to admit is disappointing. The fight itself is dependent on how well you've adapted to the controls, it can range from frustrating to a pleasant challenge. Overall I had fun on that first run.
The controls were certainly a huge barrier for a lot of people and there were reports before the game even went out that they were not really usable by the developerrs (I would love to know the full story about this in a few years when we can hear directly from the development team about this story. I'm in the opinion that this was FUD spread around to insiders, but of course this is speculation on rumors so I know nothing about what happened). Anyways the controls do present a higher barrier of entry than is necessary for a Star Fox game, but they can be learned with patience and dedication. I felt like they clicked 1 and a half hours in give or take, but I would not hold it against someone who didn't like them. One thing that does bother me (feel free to correct me if I'm wrong) but the D-pad is useless in the game.
For the vehicles, I did like them all, but the walker in particular was a rough learning curve due to the nature of its movement.
Star Wolf battles, like in Assault are the high point and I really like what they did with the fights.
In terms of the "slow gameplay" from e3 and whatnot, I didn't really feel like the game was slow. There were few times I was waiting to do something, the screen almost always had something for me to shoot at. Maybe I should give Sin and Punishment 2 another shot to understand this complaint
Now to the negatives, like I said earlier, the controls take a while to get used to and the lack of multiple endings is a bummer, but there are two other things that were stuck in my mind as I played.
1. This game was designed for 1v1 online multiplayer, this still disappoints me and with EA having the Star Wars license, I will continue to be disappointed.
2. There is no boss where Fox runs up a ship shooting it up a la Metal Gear Rising even though the intro really demonstrates that COULD be a thing.
TL;DR: I think Star Fox Zero is deserving of its 72, but I had a lot of fun with what I played and I know I will be going back soon to continue to play more as even the Star Wolf battles never get old upon replay.
I'd give this a 8/10 and recommend you look to rent the game first if you are interested but on the fence. If motion controls make you hesitate I wouldn't recommend it at all and would suggest you spend your money elsewhere