For me Warships ground to a halt about a week ago at level 22. In straight out battles I'm just up against people with the same troops and almost exactly the same base layout. Nobody can do anything other than smash a few defences, it's stalemate and boring.
Half the time it's a matter of waiting to see who retreats first after not even attacking so I/we can lose 20-30 battles, drop down three grades and win a few engine rooms that way. Not worth bothering with.