I would not cry about losing danzou either but is he still a Kage? Maybe people at home at the Hidden leaf think he is, but they dont know what happened at the meeting. Technically he is probably still a Kage. So, when it's going to get a long fight (and that's possible with all the 1 ups) he could die (or survive) as a rogue ninja instead of a Kage
edited after cal Kashi's post: Yeah but they decided on the spot that kakashi should be hokage, You don't know if other important leaf people and elders agree to this....that's just an assumption.