Uh. Literally nothing about how projectiles work has changed. Certain characters are hitscan (instant hit where crosshair is) and certain characters are not (delayed hit depending on projectile). Those who are not include Hanzo, Torbjorn, Orisa, Sigma, Pharah, Junkrat, Echo, Lucio, Mei, most of the cast really.
This has not changed. Not one single hero has changed in this regard.
Did you played Ana, Bastion, Thorb, Sym, Doom, Zen, Mercy, Mei, Rein, Road, Junk, Phara, Hammond or Sigma? I am just using some as an example but a lot of heroes have that kind of projectiles, its part of playing a shooter.
Yes, as a tank I need to learn how everyone works because I need to learn how to protect myself and my team from them, shots from thorb are different from widow in both speed, angle and power. You learn this by playing the game, even fireballs have their own trick speed, area and angle to learn. My job is not just to swing a hammer. My job is to protect the team, and take the point/payload.
Aiming felt off at the start, since there was a bug where controller settings affected KBM. I believe it’s fixed now, though.
Aiming feels just fine, and projectiles haven’t changed from OW1.