Just thought I would throw a few ideas out here, since I am sure that I am not the only one to be disappointed by the inactivity on Popham. JC has probably considered all of these and rejected them for good reason, but would like to hear from other members on what might help the expeditions. Just brainstorming, so please don't hate on me too much!
1) Very valuable exclusive items (eg 6 slot hat, new +30 feasting artifice.) These could be transferred to Providence by creating an expensive "package." The package would be stored in a townbell and shipped in 3 months or end of server, whichever comes first. This would increase the attractiveness of raiding. Perhaps combined with the final week of the server having bloodmoon and nerfed walls would lead to some serious PVP. I realize animals were supposed to fulfill this role, but didn't work out.
2) Increase inheritance above 100%. Not sure what the right number here is, but building a 300 bile hunter alt might be more attractive if you inherited a 350 char at server end. Perhaps 100% should just be sold at the estate planner, and then 1% extra per visit to the Family Statue.
3) Dual character progression. An option to receive a certificate to apply proficiencies to your main on Providence, instead of inheritance. A crafter who is weaker than your main is not terribly useful. This would obviously have to be balanced to offer a nice reward but not be too exploitable.
4) Easier slotting. Getting 500+ thread and needle on a temporary server is not fun. One way to accomplish this would be to create an (expensive) item which fixes broken slots (or clears the whole piece of gear.) That item would go quite nicely with point 1. Of course you could also just increase odds of slotting success. As an aside point, I think feasting should be balanced by biles not gobble points. So, for example, a 100 feasting set could give you extra gluttony points up to 50 biles, and a 1000 set would give gluttony points up to 500 biles.
5) Vastly decreased cost of Cain and Able. It's a temporary server where you can inherit lost characters on Providence, so murder is less consequential and hence should be a lot cheaper.
Finally, could we have some small hint as to when Popham might end? Like any day or is no one even close? I have a lot of spare time for the next 6 months and have been feeling the Salem urge hard...