At Gamescom 2016 in Germany, we had the opportunity to do a short interview & conversation with Jacek Pudlik, the Associate Publishing Producer at Wargaming.net. He was able to give us a brief overview of the direction the game is heading along with touching base on various issues.
The Nikolai was a mistake. The ship looked balanced on paper and it seemed fine during testing. After the release, with increasing numbers of the ship, it became clear that it is too powerful, so it will not be sold again. Having one ship in a game is fine but with divisions it really becomes a problem. The ship will still be used for giveaways/contests on occasion.
In the future there will be more extensive testing to prevent another Nikolai.
Overall, they are pretty happy with everything except carriers. There are no concrete plans for a carrier overhaul yet but they want to change something. One idea may be giving carriers more direct control of planes in some way, but this is just speculative at this stage.
They want to reward personal performance, such as providing spots for your team or tanking damage. What exactly we will get is uncertain while they collect data.
They might add other PVE elements in a regular game mode. There are already forts. There is a possibility for radar stations or stationary AA. The bastion game mode is still in testing. The chance of getting it is currently reduced. There are no additional games modes planned at the moment.