Hey Captains,
This is a good topic Destroyer_KuroshioKai to bring up and discuss. I will say this: a good DD player will be the difference in most games that are close. A DD player that understands their ship inside and out will be a great boon to your team. I like that you talk about spending the time to improve at a certain class and realizing that you had areas to improve. A player is only as good as the time that they want to put into learning mechanics, maps awareness, ship strengths, weaknesses and above all from mistakes. We all make mistakes as players, none of us are perfect =).
Now, to the topic at hand regarding CVs focusing DDs the whole match. You captains have pointed out certain things that make sense. If the CV player focuses down the DD at the beginning of the match, that can be beneficial for the team but there is a cost to doing this. What if it takes you multiple runs (most likely will) to accomplish this? What if you continue to focus the DD and not actually kill it? If this is your strategy you are relying on your teammates to win the rest of the map for the most part.
Knowing where the DD is almost as important as outright killing the DD right?
I suggest using your time equally, what I mean is to attack the DD if it is going to net a positive return. The better the DD, the harder it will be to kill that ship, yes you might in the end but what did it cost you around the map? You have to be able to split your focus equally. You could get so focused on the DD that you miss the opportunity to attack the low health BB or cruiser and get their guns off the water.
These are just a few thoughts that I have on the topic and I encourage y'all to continue with the constructive discussion.