Don't you understand, that creating useless extra boost is pointless. We have skills like experience, game shape and skill combination - this is all you need to play offences successfully. If your player seems to make the same kind of mistakes over and over again. Perhaps you should start training the skills that affect those mistakes or wait until he gets more exp. Even adding 0.15 game shape value to certain offences leads teams to select most (if not all) players with that added bonus. Eventually leading to price distortion at the TL, with certain offence type players price going up and other player prices dropping. How many good managers you know who do not use specced staff? It's a small boost, but it's still a boost, that might give you an edge over the other managers.
Nevertheless your trivial 0.15 GS boost to your SG player (or whomeever you want that quick fix for)
will not make him suddenly a great decision maker. He still needs to have the skills to back it up. If he does not posess the passing skills to find an open man in pressure defence, no knowledge of the current tactic used, helps him in that situation.
"giving him 2 more levels of passing"
I never said 2 levels of passing will cure it all. I said your JS, DR are too strong compared to his PA skill, thus making him drive and shoot before going for the harder option of passing. You knowledge of his skills and tests in different positions, should already inform you of his weaknesses and strenghts. Why root for the quick fix?
I have seen a lot of suggestions. Suggesting itself is good, but people tend not to think about the suggestions effect in the long run. People need to understand that suggesting something in the area: "the players plays better today, because he had dinner with his mom and is happy because of it" or "player plays better, because he just had an intimate moment with his girlfriend/ plays worse because his legs are gone because of it / or just broke up with his GF" is pointless.
All of these are RL events, that affect outcomes in games. Are they good for BB and would they fit in? No! They make the game messy.