I like these ideas! Would the player liasson have any additional “Duties” in your mind aside from the aforementioned ones? Perhaps have duty to transfer… tension between players to HQ as well, as maybe “state of the playership” (what are the matters the players feeling very positive/negative towards etc)?
How about random day and hour spontaneous vs’s and/or HH’s? Weekly or less frequent (but not less frequent than monthly imo)?
Maybe these spontaneous vs’s can be player themed/named as well? like that it doesn’t add any more work load to daniela/gms in making artwork for the vs. Something can be given by the player who thought the vs’s name and/or found from royalty free-internet sites or created by players somehow if they have the know-how. 
How about in the nighttime marathons some of them can be a combo between marathon and vs, I mean 2 cells 1 for each team, if/when a team finishes their cell before the other team then both teams go on to finish the other cell combined? Maybe it’ll inspire some community/chat build up?
How about there can be a sort of marathon week? What I mean is admins decide on a random week in the month and declare “all cells finished within this week will be considered as “marathons””? without the marathon tags etc normal lv1/2/fort cells but give (cube/sc) bonuses etc as per marathons, maybe with/out the naming the cells bit (less logistic nightmare for the GMs, altho maybe a player liaison could also help facilitate those things? (namings etc) I think having this in a random week every…5-6 months or so would be nice . I think it could inspire people to play/chat more and who doesn’t like gigantic bonuses, lol! Maybe since there’d be lv2’s in the mix (and forts) it could also inspire (more) ppl to pass the lv2 tuts/get promos to scout > scythe (to have fort access in next such event).
I don’t think there’d be such a huge need for new cells during such a week as scythes can’t be active 24/7 lol and things would maybe get completed a bit faster than usual, but not overly so that admin(s) creating new cells would lose much sleep over it, what with no hidden cells (everyone in 1 cell) and being a week long event scythes would have to do other stuff as well (cant put off work/social life etc for 7 days lol), but I think no mystic during that week would be a given to have scythes concentrate on ew cells instead.
I like ann’s idea abt the featured ewe’ers on landing page as links, get people engaged and "hmm so these are ppl from all over the world playing this game? " and so on.
This may sound silly but what if an admin (dif one per time) and in dif day/hour each time started a convo in chat about a specific subject in a field of science, philosophy, tech, social, maybe even politics and so on, maybe player liaisons can gather possible subjects from people and pass them on to HQ, maybe admins can also choose from subjects they want/think can stimulate community/chat bonding/increase.
something like an “intellectual night” with admin(s) participating and arbitrating the convo for as long as it lasts, and who knows maybe convo will veer off the start subject and continue in other subjects as well. I think that even with -maybe- somewhat subjects discussed people will not get nasty in ew, especially with 1 or more admins active in the convo.
I’ll try to think on more ideas
If it’s at the same day/time every time it happens, a lot of players will miss out. 