No they changed SOME parts.
Jack Atlus is more of a badguy then the original. (Like somehow he made it so the alarm will sound when Rally stole the chip)
The policeman and Yusei knew each other previously in school or something. He dueled him cause of hating him in the past, not out of dueling respect when someone challenges you.
But yeah, keeping the sound/music was interesting. But they still took out the OP/ED
Wait, they're skipping the last 4th season? Then again, that season REALLY SUCKED REAL BAD.