Headers. Finesse shots. Low driven shots. Lob through balls. Ground through balls. Ping pong passing. Etc etc.
Pick whatever year you want, there is always a different OP and exploitable aspect of gameplay that is present due to the overly assisted passing and shooting.
Every year the playerbase calls for nerfs to the specific assisted problem of that year, so EA nerfs it, but then another assisted exploit pops up again next year.
Why? Because by it's nature, assistance overrides player input, and essentially the game calculates on it's own how it thinks passes and shots should play out. This leads to some assisted moves having higher or lower probabilities of working then others, which then of course translates into how people play the game (finding sweet spots and abusing that same mechanism over and over).
Not only that, but it also indirectly effects other aspects of gameplay through balancing issues, ranging from defender interceptions and tackles to goalkeeper saves. For example, if you aim your pass to player there is a certain 'window size' that the assistance will try to correct for you to get the ball to travel to that player; however, the game cannot assist (or correct) that pass 100% of the time because that would be unbalanced and unrealistic, so what happens is that the game, at times, adds randomness to your passes, shots, interceptions, saves, etc, to try and 'correct' or 'add realism' to the very assistance it is working off of. This leads to scenarios that at times just feel entirely out of your control, whether it is a defender deciding not to intercept a ball, or a pass not going where it should - as I'm sure most people have experienced.
So what is the solution?
Simple - lower the levels of assistance. Make the input of player aim and power bar timing matter more, so that the player is in more control, rather than the computer assistance (or the programmers that created it).
Frankly I think assisted, as it currently functions, should be outright removed from online play. It is too overbearing and simplifies the game so much. Something around semi-assisted should be the standard.
I am not advocating for full manual as I believe that that is too difficult for the vast majority of the playerbase. However, I genuinely believe that there is a healthy middle ground to be found that would improve the experience for most people. Something around semi-assisted is not that difficult to play - 'casuals' adore shooters like Call of Duty and Fortnite which rely heavily on basically manual aiming with some aim assist. Even those games are nowhere near as dumbed down as the assisted levels in FIFA.