I don't understand the big deal. Sectors don't
do anything anymore, and they never really did.
Under 2.2 sectors have literally no relevance to your game except for assigning leaders. And this might be my own bias, but who cares about leaders? They're expensive, with trivial bonuses and most of your slots go to scientists and admirals anyway.
So the only reason to notice how the sectors are drawn is based on where you want to assign a governor, and that's about the least important thing you can do. If you just turn off the sector view like
@Alekou suggests, you'll stop noticing them altogether.
I'm sure there's a vision for sectors down the road. Since this is almost entirely a cosmetic issue as far as I can tell, I'm inclined to just sort of shrug until we see the intended use. (Honestly, I might have removed them altogether pending that future update.)