I agree with trying a different CM. You should be able to request a lake-view even with a Standard room.
I just tried pricing out a trip on their website and still see the 4 categories we mentioned above: Standard, Standard Pool View, Preferred, Preferred Pool ViewThe CM's explanation is that there are now 3 tiers of room instead of the four used on the map because I was basing our recommendations on the diagram/map posted above. I had the option for a standard, preferred, and pool views. Seems like they wanted to include those "lake view" requests as preferred so the option can only be entered when you book as as preferred; I was surprised because I had done my homework, including considering everything in this post, and thought I knew what I was doing. I will probably make a call in a day or two to verify everything.