The focus on the new maps is not to be 3-faction maps but so that a faction is defending against the enemy and succeed if they hold the "hill" long enough. Having it 3 factions just adds some tactical aspect as you 1) can time your hill attack so that you might start your main attacks at the same time as the other attacking faction to weaken the hill faction the most effectively, 2) You can try to cut the flow of the other attacking faction by planning a sneaky attack on their comms truck (wake island) and 3) you have to choose weather you should aim at the enemy attackers or the defending faction when you face boths (and yes it happens often enough, at least for me), it completely depends on the situation. Also yesterday, while I was playing Wake Island I sneaked up to northern airfield bunker to try to disable the spawning point of the brown army and there was a guy from the other attacking army there (it was Modest I guess

) who had the same idea, so that we ended sneaking in the foliage against each other until we started to exchange a few shots.
Also the 2 new maps can easily be made for PvP/pure PvP/assault and invasion on top of KotH and that will most likely happen.
Anyway, for myself I think that KotH is pretty interesting. It requires a higher tactical approach as attacking without flanking won't help much. It also brings you directly into some action (especially Insular which is pure action all the time).
The next map will also be a KotH map but a bit different, as you will have 3 attacking factions and the hill will start as neutral. Also the hill will be much bigger, e.g. large scale KotH and again it should also be playable as other mode.