The fact, that late registration is still possible, does not change my strategy at all. Maybe you can say, that some people will (incorrectly) be more willing to take risks, if they can reenter, and that we can make some small adjustments for that. But its not a big deal, and it will totally depend on, who is at your table. Good players dont play any different, just because they can reenter, because reentering cost money.
The much more important change happens, when the bubble approaches. This is, when you really need to make adjustments either to avoid bubbling yourself, or as a big stack to apply pressure to small and medium stacks, who might be overly concerned with bubbling. The most important phase however is the final table. This is, where the big money is distributed, and here you really need to understand ICM and the importance of stack sizes.