If views are important to you, then the best views are "Disney Springs View" rooms on the higher floors in the main tower. Note that the "Disney Springs View" is considered an upgraded/higher priced room type but worth it if you views are important to you and your family. Also being in the main tower gives you direct access to the main lobby/restaurants/etc. within the same building.
If views are not a factor, than the "Island" building rooms would provide easiest access to both the pool and the walkway to DS. The island building is a separate building from the main tower so you would have to walk via an outdoor pedestrian bridge to get to the main building for the lobby/restuarants/etc.