Trying to Figure Doomfist Out [Overwatch]

Doomfist has released and with him comes a huge shift in the meta. He's a hard hitting character that will one shot many of the characters, doing 250 damage if he slams them into a wall.

I'm having a hard time learning how he works though. Is he a flanker? Is he better in a group? That's something I'm trying to figure out.

There are a few things that I have learned at least:

1. He's not good out in the open. Any hit scan hero can wreck him if he's out in the open and not with the team.
2. He has high mobility but only when his moves are on cool down. If you've used the abilities and they are cooling down, you need to try and get to safety for a few seconds.
3. He seems to be best used while the team is fighting because he can appear out of nowhere and slam into someone.
4. His shotgun looks to be projectile based and not hit-scan. You have to lead your shots.

These are a few things that I've figured out. If only I could bring them all together. I think I'm learning it, but the video below clearly shows that I have a ways to go.