Yeah, Setsuno kinda needs to die.
About Starjun, there is a room for doubt on him being a NEO. It is clearly shown that he is a food enthusiast. Searching for something. Clearly knows Midora wont share GOD. Since Big 3 wont or cant go to outer realms which something he would want to, he might look for alternatives.
And considering NEO is rising at the food festival they might want to gather all of their members there possible. And since Limon doesnt have the vibe nor the character there is only 2 person from Bishokukai left there. And i dont see Grimpatch as a NEO.
Other than Starjun, do you think NEO will still have double agents outside the FF. It would be very risky if so dont you think?