Another improvement I thought of: not just allow editing a country entry down to 1 city/region, but allow listing multiple regions/cities under the same entry. For example, I am currently a travel helper for Thailand; I would love to change that to being a travel helper for just Bangkok, Chiang Mai, Ko Samui and Phanum Rung/Buriram, but needing to create four separate entries is a barrier to entry, and it'd get hard to maintain (plus the list on my profile would get huge)
Good point. That would indeed improve the ease of adding them a lot.
I think it may also make sense to be able to add yourself as a helper right after editing a guide article. Much like you can now tick a box to add the article to your watchlist.
Would also improve that profile problem.