Just my two cents, The Rebbe gave us enough avoda to work on till Moshiach’s coming, and tasked our generation with bringing him. On 28 Nissan 5751, The Reeve said that the only reason he could see that Moshiach hasn’t come yet is because it needs to pass from being the Rebbe/ leader’s obsession with everyone following along, to the personal project and passion of every man woman and child, until someone gets it done.
As mentioned, The Rebbe set up a system of personal Mashpia/ Rav to discuss personal questions with, and all of us today find personal connection to The Rebbe in whatever form that takes (writing/ iggros/ Jen/ The Rebbes Torah/ niggunim etc)
So Lubavitch is definitely not leaderless, the center stage
is the regular people’s by design.
Just a fascinating note, I just learned L”S 11, p11, footnotes, (from 5729), that Moshiach will come when there’s achdus in the inyan of talking about Moshiach etc…
“And through the achdus of yidden, there will be achdus in the world in general. Achdus is like the inyan of Echad (vs. yochid-ED)- people will retain their different opinions but will be in a state of achdus.”
It seems like we’ve gotten a wake up call to pull this tether now, and it seems from the response that this is already happening BH.