There is a Q&A with Heroes producer Fabrice Cambounet at the new "sfidanzized" heroes-fr.com. The original article is in French, but an English translation is provided. Here is what Fabrice had to say on the patching situation (after 1.6, 2.2 and 3.1):

"The current patch plan is not finished yet. In the now traditional Heroes 5 way, the initial planning has been considerably delayed (about three months). On the bright side, it also allows us to better include fan feedback, since the community rose some issues that we didn't plan to address at first. We still have a few patches to release before we reassess the situation. (...) the support plan for balance and debug is supposed to last beyond 2008 if necessary. The adding features part depends on the end of the patch plan."

And on the new Heroes Complete package:

"The Complete Edition has been entirely carried by our marketing manager, and I use the occasion to publicly thank him for his investment in making the project successful. This special edition indeed allowed to move forward with the art book, which I despaired to see become a reality. I wrote the general layout two years ago already, during a sleepless night in an overheated hotel in centre Moscow. It was initially planned for a coordinated release with Heroes 5, then with Hammers of Fate. The third try has finally succeeded, and the result is highly worth the wait. I really hope the fans will like it!"