AK's tools were simply overrated. His heavy shot for example seemed like it would be an amazing tool, but in reality at the NHL level he couldn't get it off quickly enough to be dangerous, so in retrospect it wasn't actually a great/insane tool.
For Slaf, we'll have to see how his tools translate at the NHL level.
Things that Slaf can do that AKostisyn couldn’t do
1- Use his one-timer
2- Feather a pass
3- Tip the puck in the net
4- Go end to end deeking players
5- Physically push around players
6- Jaw at the other team
7- Win almost all his board battles
8- Back into Ds shielding the puck
9- Do Savard spinoramas
10- Passing the puck back to himself using the boards
11- Passing the puck back to himself using the back of the net
12- High IQ passes
13- Using his reach and body to beat players on a rush
14- Regularly just ripping the puck away from other players
15- Use his massive wing span when forechecking to force opponents to make mistakes
16- Probably has the longest arm/stick wingspan in the league.
17- 3 inches taller and already 25 pounds heavier than AK’s peak playing weight
18- Regularly launches players on breakaways
19- Regularly gets the puck to players alone in front of the net
20- Can score with his backhand.
21- Regularly makes perfect tip passes.
22- Supreme self-confidence
23- Can turn on a dime either side with little or no space
24- Can play the point on the PP
25- Has several different open ice dekes
26- Quick reaction time in front of the net
27- Play keep away in the Ozone
28- Can completely circle the Ozone with the puck on the PP or ES
Etc…etc…
PS: I always liked AK as a player.