Tharvot
Crusader for Truthiness
Absolutely agree that once she lives she's not coming back. But you'd have to think it's part of her long-term plan to leave someone she trusts (not Daario's sellswords and not the Dothraki) won't let Slaver's Bay turn back into what it was before she arrived. Otherwise, why bother losing part of her army to free the slaves and wasting everyone's time by settling in Mereen for so long? She already learned what happens in Yunkai when you conquer a place and leave it without any plan to govern it once you leave. Now, who knows what could happen to change those plans like the dragons burning it into a ruin or something? So it could be that there will ultimately be no need to leave anyone behind but it would have to be part of her plan at this point.
Perhaps. But she can't really guarantee anything since she's going to be headed westward. Given that Missandea and Grey Worm are 2 of her most trusted advisors (and GW is head of her military), I find it hard to believe she will be heading out w/o them.