The more we are seeing new armies and commanders etc the more we understand how stupidly great the 4 HK were
4HK have remained the pinnacle of subs for obvious reasons.
That said, with the way Hara has been telling the story since Shukai, it's highly unlikely enemy subs will get the panel time to show the kind and level of skills you associate with the 4HK.
Just look at the pace of this war, supposedly the final battle for Zhao and we're already on Day 3.
Hara's priorities in advancing the story really won't allow for wars to be waged by its chief commanders in detail, never mind the subs.