That's literally not the case though, my team is 86 rated with 31 chemistry, and play the same as always. EA devs aren't just going to make it so that chemistry reverses for Squad battles, that is ludicrous. It's literally just an AI thing, the AI for legendary and world class has definitely been buffed, but for some reason it hasn't accounted for low rated and chemistry teams.
In 25 you could tell even when a higher rated team had low chemistry, nothing was quite as sharp as the higher rated teams, and you would often find holes in the team where players are out of position. This year it is just a sweat festival no matter what team you face.
Only plus side now, is that they have buffed the rewards a bit to make the effort worthwhile, especially when playing for elite 1.