I don't have a full opinion, as i have still played only 4 matches, 1 in the pre-loading screen (while i was waiting for game to download), 2 in ML on TopPlayer and 1 friendly in full game on SuperStar . The obvious difference i saw from demo, is the ball feels a little bit faster, especially in the match i tried in Superstar, the cpu was linking so fast passes that i could hardly watch the ball.
About AI cheating, in the pre-load match the Fouls were 1 for me & 1 for CPU, they scored their FK. In the 2 ML games, in both matches it was 0 fouls for me , 3 for CPU. In both matches i won 2-1 and both goals i conceded were from Free Kick. It seems that the AI is more human than in 18-19, but if it stays like this, the last year's CPU cynical low-cross spam, is the FREE KICK goal no matter the distance of the FK taker.
All in all in 4 games i conceded 3 goals all from freekicks. I know it is too early, but is seems a little bit strange.