"Heroes 5". But are they really "Heroes"?

Why do the dragons look so similar? And in general, Heroes of Might and Magic V features most of the units that are popular among players, but with their old appearance (for recognition!).

On the contrary, I think that there are no popular units with their old appearance in the fifth game – they have all been redesigned, and not always for the better.
For example, all the dragons are worse, as are the hell horses and unicorns.