Archangel Castle published recently an interview with H5 producer Fabrice Cambounet. If most of the questions have already been answered before (regarding the updates, improvements of the duel mode, and so on), there are also some things of interest :

On the question of the "simultaneous turns" :
FC : We haven't forgotten this mode, and we're still working on it. It will be added to the game in the future.

On the questions of fan-made mods :
FC : Mod creation shows brilliantly how much devoted and creative the fans are. (...) For the moment, there is no official support for these creations, but we're thinking about it.

About the way the game was received by fans and critics worldwide :
FC : (...) The sales are very good in most countries. The game is close to become the most succesful episode so far in terms of sales.

Click here to view the original page (in french)