Room requests by specific room numbers are harder for the room assignor to fill. What you might want to do is go to the map of AKL ... I think there is one on this site ... and look at how the rooms are situation.
Last year we were on the third floor (lobby floor) with a view of Arusha Rock. It was magnificent. You could request a trail and then if you wanted to be close to the pool, restaurants, lobby, etc. you could let them know. In the past, we've also requested a certain floor and trail. At other times, we've requested a certain floor and specified a proxmity to food court, pool, etc. We not yet been disappointed. We prefer floors at the third floor level and not up on 5 and 6. That is why we don't do concierge ... plus they won't guarantee a savannah view room.
There are some rooms that are quite a hike from the lobby, etc. but some really like those as there is less traffic in the halls, etc. Depends on what you are looking for during your stay.