From what I recall, your view options are standard, pool and savanna. That being said, I'd been told that when you pay for savanna view ... you are paying for a guaranteed best savanna view. i.e. everything else is the "lesser" savannas...which from what I could tell just meant we didn't have close ups of giraffes and zebras. Case in point- the pic below of a fenced off savanna section way in the distance
This is heavily zoomed with my telephoto lens...
Still, we had great views (with my shorter range lenses) from animals that were in our immediate savanna...
Obviously, I cannot guarantee that online check in will give you the same options as we had or that they'll put you in a room with a comparable view, but if you do at least get these options- and it sounds like it's the norm...you may want to pull up a resort map and decide which of the noted savannas is your first choice for your room preferences.
Aside from this...we didn't go out of our way or ask for the room or do anything beyond check some boxes with preferences that were automatically provided to us by Disney. In fact, at arrival- the CM at the desk even noted we were booked in a pool view room. So, hopefully you will get a room you like...but even if your view isn't along these lines- it is a gorgeous resort with great views and animals in so many public areas.