My opinion is rather the opposite: the architecture in the fifth part, although beautiful, is too fantastical. IMHO, the spires are an overkill. And the buildings don't match each other in terms of design. And the only building that looks reasonably formal, the vampire dwelling, seems out of place among all this fantastical stuff.)))
In the fifth part, perhaps the best combat units. But the architecture is best in the third. As for the fourth... it's neither here nor there.
But I can't help but notice that perhaps we should discuss the question: what did the authors (artists) want to say with this? I don't think Nival has any problems with this. What do you think?