Animals are unpredictable (even with Disney pixie dust guiding them to certain viewing locations), so the views you get on the Savannah can be hit or miss. I have stayed in a Jambo House Savannah room twice. The first time, my camera roll was full of animal pics. The Savannah was packed with animals every morning. The next trip, a few years later, we did not have the same luck. The animals always seemed to be on the far side of the Savannah, not near our room, and we spent more time in the parks that trip than the previous one.
Your mileage may vary, but if that view of animals is the only selling point for AKL, I agree you may not get your money's worth. For me, the animals are #1, but if I don't see them, I'm still happy for the view over the treetops, the resort aeshetic, the FOOD, and the wonderful CMs representing their respective countries. AKL is my #1 resort, but I absolutely see why it may not be for everyone.