A new global mod wouldn't be such a bad idea as they could pick up slack in other areas without a moderator, like P&S. I really can't think of a downside to adding new blood to the administration... things seem a bit stale up there.
A new moderator is asked many times for P&S, Beginners & Help boards and there is no new specific moderator for that board. Some other moderators co-moderate that board as well as other boards even they are not global moderators.
Adding new global moderators are only neccessary if theymos sees the forum need new ones to support current three global moderators. If current global moderators are not overloaded, and can complete their assigned works well, I don't think theymos will consider a new one.
I don't want to waste my time reading political discussions.
Ethnics, religion and politics are areas that hard to discuss and find consensus. I saw good friends become conflict with each other and almost keep distant with each other just because of difference in politics.