SMART seems like a good system. Fluid movement and animation, quick movements around environments, and just general simplicity. But I think this may be too smart.
In the dev diaries and pre-release movies, they keep saying SMART button. This seems like people will be leaping all over the map firing away, while all they do is click and mash their SMART button (whatever that may be.) I think that having some skill in doing the parkour would be a good addition. That way, making movement not spammable and rewarding skilled players with more short-cuts and control points for their team. This also makes bugs and other light-body types a more skilled class than it looks to be right now.
I think that this also warrants more reason for a demo, before I put down $50+ on a pre-order or at release order.
That's my two-cents and could be completely wrong but does anyone agree?
The mechanics of the smart button are, when held down, it will make your character sprint, as well as go over or under any obstacles in your way, if possible. Where the manual part comes in, is if you are planning to climb over something, and you jump just before you get to it, there's less distance for your character to pull himself up, as well as having momentum in your favor. This will result in a faster climb. However, if you mess up the timing of the jump, and end up trying to climb up at the end of the jump, the momentum will be against you, and make it take longer to climb.
The reason they made SMART so easy is that they didn't want the movement to be primarily skill based. Skill and experience help you move a bit faster, but a new player will be able to get around just fine. The other reason is that it takes the players focus away from moving, so more thought can be put into thinking about playing the game. Instead of dodging obstacles and timing jumps and whatnot, you are moving to where you want while thinking of objectives and strategies, evaluating where your team is, and keeping an eye out for the enemy.
The devs have said many times that its not an auto-pilot, you have to navigate the map still, not just tell the game where you want to go and wait to get there. They have also said its not canned animations, so you can still look around, shoot, or cancel whatever you are doing at any time.