I really wish they put more effort into HoD, so much potential. 
I think only a few things would have been needed to make it last longer to be honest: 
-PC/Steam release, to ensure a strong online community, text chat etc. 
-Full on Custom mode, I'm talking designing your own castles, creating own characters from accessories picked up and even music composition 
-Linked to PC release, but increase in number of player characters on a map,perhaps 8? 
-Quest system for certain items and little easter eggs 
Something like this really would have been incredible: 
https://www.youtube.com/watch?v=MTTGkHvfLqw Do you think little/big changes like this would have been enough to save the game? From the little I've seen and played, it honestly doesn't seem terrible, but I honestly think a good idea was wasted here.