A suggestion: how about subgroups for cooking recipes based on cooking style?
For example: slow cooker, pressure cooker, stovetop, oven, lazy style, cold foods, foods that store well (canned/camping/hiking choices), fast family meals, sous vide, BBQ, beginner recipes and gourmet.
I know you guys want to limit the subgroups for new users, but this may add some clarity and help those find recipes for the tools at their disposal, and ability. What do you think?