AKV is one of our home resorts (BWV the other). Do not know which 2BR you got but I would recommend the dedicated 2BR at Kidani. It gives you the second queen in the second bedroom and one long balcony that runs across the master bedroom, living room and second bedroom. With the lock-off, you get a barrier wall on the balcony between the studio and 1BR.
As to size, we consider it very spacious, but as an OKW owner, you might consider it a step to the downside since no 2BR is larger than OKW's. In any event, the Kidani 2BRs are larger than elsewhere except VGF and they have the sleeper chair and third bathroom. If you have a car, parking is ideal in the under-building, ground floor parking lot which has three elevators along each of the two wings, north and south, and thus no matter where your room is, you can get a parking space fairly close to your room. The only downside to the rooms themselves, which many do not consider a downside, is that they are darkly colored inside (earth tones) and the modern energy efficient lightbulbs leave the room somewhat dark even when lit, which can be a particular problem when trying to use the bathroom mirror.
With two small grandkids, recommend you make a request that gets you somewhat close to the lobby because from lobby to room, you can have up to 1/3 mile walk down a hallway if your room is at the end of a wing. To be closest to the pool and not far from the lobby, recommend a near the Rafiki elevator request (down that elevator on the north wing gives you the shortest possible walk from the building to a gate to the pool area). If instead, you would rather be close to the bus stop, which is on the south wing, request either close to community hall or close to the Timon elevator. The savanna views from any of those areas are very good. There is only a table service restaurant at Kidani, Sanaa, that is not open for breakfast, but I consider it one of the best restaurants at WDW. Moreover, you should take a trip to Jambo and do Boma, the buffet restaurant, which I also consider one of the best on site. The pool is excellent for kids, including because of the kids play area, which has different things for kids from toddler to young teens. I am not overly enamored with it as an older adult because it does not have an abundance of places to find shade, including because many of the trees are still growing.
One thing we have found is that the buses at AKL are generally quite good, usually timely and usually not crowded with standing room only. Also, with only two internal stops, the time it takes to get to MK, Epcot, and Studios, is not much different from other resorts that use buses to those locations even though the distance is more from AKL.The trip to AK is about 10 minutes.
Finally, if you want a 2BR at BWV in 2018, I would advise that you go between mid-Jan and late Sep if you want a real chance of getting a 2BR at 7 months out. They are not likely to be available at 7 months out during the late Sep to marathon weekend in Jan period.
Everyone from a 2 yr old up to a 62 yr old has loved their stay with us at Kidani - you made a great choice 
