This is still an issue. Other nations should respond to base capacity escalation by improving their own base capacity in certain sea zones. For example, Britain should never allow Japan to double their base capacity in Southeast Asia. I really don't like how the player is allowed to 'game' the base capacity with no response from the AI.
I have seen political messages about the other nation unhappy about me improving bases somewhere. I had not been thinking to observe with their basing ability improves. It should. If it doesnt that should be considered. Likewise we could have political messages of our own asking how to respond to them building or an increase in our naval funding due to the threat.