I can see that point of view, especially for some. However, others are not specifically unrealistic. A perfect example is the expert sonar man. His detection boost is not so impressive that he now outranges what I can hear if I check myself. In fact, I'd have to say It's still somewhat better to check with your own ears. But hell, before he was *really* stone deaf imho.
The one that gives you an extra 1 knot speed boost isn't necessarily unrealistic either, just the guys in the engine rooms know how to push the works to get the absolute best out of the ship.
On others, I'd have to agree with you though, like the guy that literally doubles the deck gun's rate of fire, so it's a mixed bag. I just take it on a case by case basis.
In my current carreer, I started with the s-boat out of the Philippines at the start of the war. It's now mid may of 43, just got a shiny new Balao and the mark 14s will improve dramatically in a meer couple of weeks! Last patrol was literally the best I ever had in tonnage. A picture is worth a thousand words so here's what I found moored in truk harbor:
