Is there any plan in place to remedy the dearth of Moderators on this site?
It will come, but the dearth of moderators on this site is not the worst in the system. Some site do not have any moderators at all.
The best we can do now is be patient and pray. After all we are Christians and Christians know how to pray, especially for our remaining moderators.
With so many moderators resigning throughout the system, I catch myself asking if the delay is not in part in waiting to see if more are going to resign fairly soon and thus the community moderators could know what number of moderators to place for particular elections. But that takes time!
In the mean time let us help Peter and Mason in performing their office by editing, flagging and voting for the good of Christianity SE.
Also allow me to thank both Peter and Mason for their hard work.