I think it is wonderful that several folks stepped forward to work on a well known person, but I think that Enno's expressed frustration highlights a significant problem that could grow to drown Wikitree as it grows.
Both in my own extended tree, and in the PGM project, there are hundreds - no thousands - of very obvious merges that each take an inordinate amount of effort to see through. Adding to this is that many merges that I propose end up with BOTH parties being managed by someone other than myself, so after I propose a merge I have no way (internal to Wikitree) of following the merge's progression.
I understand the suggested procedure for nudging a manager to do something, but if the manager has opted out of the daily email, or is irregularly active on Wikitree, this is cumbersome at best. It may work if you have a tree up to your GG parents, but if you are going back 10 gens or better, and trying to include as many GxG uncles and aunts and first cousins at whatever remove, or working on a project, it just falls apart.
The "all hands to the pumps" method worked just fine for this known person, but it is not a procedure that lends itself to a general solution. I wish I had a well formulated solution, I do not.
I do think that it should be possible to "nudge" managers more easily. Perhaps if a merge is proposed, and then re-proposed without action the merge should become available for completion automatically in some way. The "contact a supervisor" method just seems to me to be doomed as Wikitree scales up, which it already is doing.
My 2 cents,