Daycare will become his stable place in the sense that it is the same everyday and he will likely come to thrive on the schedule. You will get to know things like one parent lets him stay up a bit longer or gives him a less than stellor breakfast, etc and you learn to adapt - make up for his lot in life in a sense but not to the extreme of course.
How long have the parents been separated in the sense has the child already mastered the back and forth. If yes than adapting to daycare should be easier as he already knows the rules can be different in different places.