I would not change for the following reasons:
1. No guarantee to get connectiing rooms at Poly.
2. The Kidani 2BR is much larger and, unlike having two rooms at Poly, the 2BR has a washer/dryer, a kitchen, three bathrooms, and a long balcony for savanna view.
3. Kidani has the elaborate kids water play area and a pool with a long slide. At the moment Poly has no pool. It is supposed to open end of March/early April but no guarantee it will be finished by then.
4. There is a lot of construction going on at Poly, at the pool, the villas, and elsewhere. I would be hestitant to even stay there at all in the next several months
5. Savanna view at Kidani beats standard view anywhere and i doubt the Poly lake views are going to be that great.
6. Two studios at Poly will cost close to (standard view) or more (lake view) than that 2BR at AKV in points.
7. If you have already made restaurant reservations on the basis of staying at AKV, you cannot assume you can now easily change any reservations to something else near Poly or MK.