the 5 formulae listed below are just suggestions and are open for discussions..
it might be a bit draggy, but please bear with me if you are interested.
DRIBBLING:
The player (when COM controlled) favours dribbling when in possessions of the ball
from what i understand of the definition is that, the DRIBBLING ability defines a player's tendency to dribble rather than his ability to dribble as that is based on his DRIBBLE ACC/SPD.. this would mean that he is more of a "selfish" player than a team player.. however, this is only true when he is COM controlled.
therefore, based on that explanation, a player's DRIBBLING ability would have to involve FM's TEAMWORK as well.
dribbling >= 16 AND teamwork <= 13
however, do take note that a player who doesn't possess the DRIBBLING ability, doesn't necessarily mean that he doesn't dribble when he has the ball.. a player who has that ability is just more likely to dribble than pass when faced with a with a 2-on-1 situation.. play a COM-vs-COM match and you'll get what i mean.
based on the above formula.. players like van der Meyde & Eto'o who don't possess the DRIBBLING ability ATM after conversion with v1.2, will do so, while others like Zidane, Pirlo, Gudjohnsen & Emre won't.
ANTI-DRIBBLING GOALIE:
Can guard the ball with tricky dribbling
from my understanding of the definition, it is a player's ability to perform tricks when dribbling the ball.. this would simply mean, performing "unexpected moves" when in possession of the ball.
therefore, the first thing that comes to mind when it comes to performing tricks would be players with FLAIR & TECHNIQUE.
dribbling >= 16 AND flair >= 18 AND technique >= 18
based on the above formula.. players like Zidane, Ronaldinho, Okocha & Cristiano Ronaldo will possess this ability, just like IRL.
PLAYMAKING:
Increases awareness of the team's attacking formation when in possession of the ball
as mentioned earlier.. i feel that PLAYMAKING should not involve INFLUENCE.. because in FM, it is based on leadership and thus has no relation to PLAYMAKING.
one consideration could be to base PLAYMAKING on FM's VISION & DECISIONS.
vision >= 18 AND decisions >= 17
in this way.. players like Kaka, Rosicky & Ronaldinho who don't possess the PLAYMAKING ability ATM after conversion with v1.2, will do so, while others like Raul, Ibrahimovic & Duff won't.
PASSING:
Allows the player to make through balls and goal creating passes with perfect precision and timing
just like PLAYMAKING, a player's tendency to pass the ball during a match is very much dependent on his decision at that particular moment.
therefore, the PASSING ability should also involve FM's DECISIONS as well.
passing >= 18 AND decisions >= 17
as there are a too many defensive players with the PASSING ability ATM after conversion with v1.2, based on the above formula, players like Nesta, Helguera, Gamarra & Ronaldo won't possess that ability anymore
SLIDING TACKLE:
Improves sliding accuracy
based on the definition, it is easy to base that ability with FM's TACKLING ability.
however, this would mean that players with very high tackling in FM could simply possess the SLIDING TACKLE ability in WE/PES.. this would result in many players with that ability.
therefore, i instead considered the tendency of a player making a sliding tackle IRL and thus made use of FM's BRAVERY in the conversion
tackling >= 17 AND bravery >= 18
players like Heinze & Butt, who don't possess that ability ATM after conversion with v1.2, will do so, based on the above formula.