We have had both Arusha savanna view and Sunset savanna view at Jambo. Both were very good. We actually consider Arusha somewhat better than Kidani Sunset savanna view and Jambo Sunset savanna view to be about the same as Kidani.
Nevertheless, I would not make the move just because of the refurb. Those soft good refurbs are done in stages and, most often, you hardly even notice one is going on when you are there. However, if you have a studio reserved, rather than a 1BR or 2BR, I would make the move; the Jambo studios are abouit the same size as Kidani and the shower/tub is in the same room as the toilet while the Kidani shower/tub is in the open next to the sink.
Jambo's advantages include the three restaurants (a table service, a buffet, and a counter service to Kidani's one table service restaurant), much larger lobby and store, larger pool with more places than Kidani to find shade, and though you can have a long walk from room to lobby at Jambo, you do not have the risk of ending up in another county like at Kidani. Kidani's advantages are the much better and larger 1BRs and 2BRs with the extra bathrooms, the much longer slide at the pool, the elaborate water play area near the pool, the first bus stop going and coming from the parks, and the under-building parking which, coupled with three elevator areas on each of the two wings, allows you to park near your room if you have a car no matter where your room is.