There are way too many ill-conceived categories already, and once a category is created it can't be deleted. Let's not start creating new categories before there's been discussion of the appropriate logic for the categories.
Many of these Palatine immigrants and their family members have multiple duplicate profiles created by Gedcom imports, often with variant versions of the person's name (for example, a man baptized as "Johann Adam" might be here as Johan, Johann, Adam, and John, and a name like Schaeffer has multiple spellings). Categorizing them is the least of my concerns. My goal in requesting PPP was to get two of those duplicates merged, and avoid having merge go toward the wrong LNAB. (Protecting LNABs is the main purpose of project protection.)
Added: The G2G discussion https://www.wikitree.com/g2g/324027/is-anyone-interested-in-a-palatine-migration-project
is likely to provide a forum for creating new categories, etc. Since you possess Henry Jones' books, Tim, you'd be a valued member!