Thanks for the set.

Firstly, I don't think it's necessary to have such a long set, I would focus mostly on 82/83 season when Atli finished the season with 21 goals in 34 games and as the league's second top scorer (5 goals in the last match) or 82-84 in best case.

Overall, he was pretty slow, not very agile and not so good passer as the set shows (especially I haven't seen his long passing at this level).
He did have a fantastic header, fine technique (albeit slow DS) and he did know how to find a way out from 2-3 players.
Fine scorer as well, also from tough situations.

Suggestions:
Top Speed: 79 -> 77
Acceleration: 79 -> 74
Response: 80 -> 83
Agility: 78 -> 73
Dribble accuracy: 80 -> 76
Dribble speed: 78 -> 74
Short Pass Accuracy: 81 -> 79
Long Pass Accuracy: 79 -> 73
Long Pass Speed: 74 -> 77
Shot Accuracy: 81 -> 82 or 83
Shot Technique: 81 -> 82
Swerve: 70->66
Aggression: 80 -> 76
Mentality 80 -> 78
TeamWork: 78 -> 73
Weak Foot Accuracy: 6 -> 5

- I would perhaps lower header by 2-3 points & increase jump to 85/86
- Add position: CB (played in NT in these years, especially in 1984) and in 1985 with Fortuna - can be optional as well