Completely disappeared without a trace. And deserters, who should have been brought back from previous installments of Heroes.

So many old and good units have been lost. It would have been possible to simply transfer ALL units with abilities from Heroes 3 and 4. And if we go further and develop the castles, we could even have 2 units of each level in each castle! And not as an alternative, like in Heroes 4, but two units right away! That would be very interesting to me, and most importantly, there are resources, so many units have been forgotten!