My preference is for well sculpted figures. While John's Indians have nearly always been very good, the very early rangers and early French Militia were not his best work. The later rangers are much better figures.
Clearly, an updated release of French Militia would be highly welcome. As for myself, my preference would be for more camp scenes figures, officer conferences, tradesman, or a theme release, similar to the French Army figures in WWI which all hold together (maybe his best figure work ever). I am very fond of the relaxed 60th releases - canteen, at ease and pipe smoking figures. No objection to these being French Militia.
A club set release for Lt. Colonel Thomas Gage and an Indian War Canoe (big canoe - 8 - 10 figures) are at the top of my wish list, as is a 32-pounder garrison cannon, but I would settle for an 24 or 18 pounder (amazing no manufacturer is offering a stand alone garrison cannon (pirate/ship gun carriage; barrel length would be similar regardless of cannon bore, just the thickness of the barrel would vary).
Unsure if a release of Monongahela depicting the retreating British would be as popular as the French WWI releases that depict a similar theme, but catching magic in the same bottle twice is most difficult. Officer conferences at Ticonderoga or Quebec seem more plausible for a theme release - large campaign tents, tables, props, plus a dozen or so single figures with the officer from the 44th being the most animated as he can do double duty at Monongahela and Ticonderoga. Both British and French plus both Ticonderoga and Quebec (Wide Overlaps).