Has it ever been explained why they don’t need droid control ships any more? In the old EU this was the whole reason nobody used droid armies - they relied on transmissions from a control point that could be easily jammed. But now in the other prequels and all the media that followed it’s never mentioned.
I always thought the droid control ship was just contrived specifically for Phantom Menace, so there would be a single point of attack the good guys could target to win. There’s so many cases in fiction where they setup an overwhelmingly powerful enemy force that can be taken out by some single point of attack (e.g. Death Star exhaust port, Sauron’s ring, etc.) for the sake of neatly wrapping up the story.
Arguably, ROTJ sidestepped this problem by leaving it vague what happened to the Imperial forces after the Emperor died.