Just a noob, but the thought occurred to me that an outdoor switch becomes a point of failure such that all the cameras connected to it would stop working if it died. Of course the same would happen if the switch inside that all the cameras were home run to was to die. But a switch inside could be perhaps of a different grade (e.g. enterprise class) and protected from the elements, possibly have better quality power. I especially worry about heat. Some places in the world, especially in direct sunlight can get awfully hot.
Myself, I am in the design phase and thus I've been thinking about this situation. I'm currently going to an inexpensive semi-managed switch that'll run up to 4 PoE cameras in the area and then send all the data along 1 network cable back to the house network. I may change my mind later if I discover problems with my approach.