Why do you want Q to come back? Why would Q come back?
It is not hard to figure out why Q went AWOL. Q in not in the loop. Q only pretended to be. All Q shared was in the public sphere. Q rallied the troops by pretending to be able to be secret agents who could foil terrorist attacks and asked a bunch of non-sensical questions, "when do birds sing?" etc. all to make anons as paranoid as possible, as only paranoia would wake anons up. But Q was never a liberation operation. The magicians print the money and force people to work their whole lives for it. The "new guard" does not wish to liberate the people, the new guard wants to commandeer the slaves.