WoT and WoWS are managed by two completely separate teams and developed separately. Just because something happens in Tanks, doesn't mean it'll happen in ships and viceversa.
As with all lines that get released in the game, we endeavor to balance them all within a certain range, while making the lines diverse and interesting. It should be noted, that while this is another RU line, seeing a split on a CA line is not new, both USN and RN CAs were split before RU CA split was being conceived.
It should be noted, that while announced with particular stats, these are very much WIP and subject to change.
So while we may seem we are introducing a lot of new ships, this does not mean we are neglecting other areas of the game. Typically speaking the people who are designing, modelling and developing new ships, are not the same people who work on "player pain points", game modes, etc. We have multiple teams working on different areas each patch cycle.
With 0.9.1 while yes we are seeing a new line being the RN CAs, we also have the following been worked on:
Narai being removed to be fixed
Upgrades being rebalanced and tweaked (yes, this will come with 1 week of free dismounting)
A new map: Northern Waters
Various balance changes for a load of different ships
Various bug fixes
You mention a lot of PvE content specifically and I will let you know currently that is not a priority for us. While we do have teams working on it, since majority of our players exist in PvP formats, this area demands more resources.
Currently the game is a healthy state, internally we have no "red flag" concerning its future.
Fem,