Dont know if its been suggested, I tried to look but couldn't find anything, well here goes; how about an offline mode? wait wait wait, I can sense you pulling back from me but let me explain a bit. firstly I make this suggestion because I spend a lot of time, without an internet connection and would like to play H&H in places like... work or a friend who has no internets place.
Here's how it could work, and before we start Id also like to say that I know this would take a lot of work to implement, the map for offline play would be generated and stored on your own PC and not clogging up the servers, the characters for offline play would be kept separate from your online play ones to prevent offline grinding. the world in offline play would be small in comparison to the one we play online, maybe only 4 super grids.
Now I know some of you are thinking, "whats the point of playing H&H offline?" well the point is to waste some time, like the current version and all other games are for. I don't know, just something I thought would be cool. I suggest it because Ive never found a game like H&H that you don't have to pay for or pay monthly fees for.