Neither of your 3 examples where cruiser/destroyer sized ships. Neither of the 3 have a bulb anywhere close to what you have drawn.
Okay, the examples shown are bigger ships. But what if "my" AU cruiser would have a small long shaped bulbuous form at the bottom of the bow? For Christ's sake, we are debating here "what if scenarios", trying to figure out what would probably have happened if... For 100% accuracy shipbucket has the "real designs" threads, right? I want to speculate on a technical basis, I want to hear opinions about some changes made to certain designs. I presume that is what AU topics are for, if we don't go too much over the line...