How did you manage to stir up trouble out of nothing? I, like Ment, am surprised that anyone could be dissatisfied with the town screen in Heroes 5.
I agree – the Necropolis Castle could have been designed differently, but everything else is excellent, and in 2005, it filled me with delight.
Your petty nitpicking reminds me of those kids who claimed that The Witcher was a bad game because you couldn't jump and climb over fences.
In other words, don't get hung up on details! Look at the bigger picture.

Added 3 minutes ago

Is it easy to come up with and draw? Go ahead. Demonstrate it, if it's so simple. That's two.

I can come up with a race in a maximum of a week from scratch. As for drawing... well, I can make some sketches – I don't know how to draw professionally. Although, I'm sure that Ubisoft doesn't have just one person working on it, right?
Does it take much intelligence to draw 7 units for each of the 5 factions? No, not really. For example, look at Warhammer 40,000, which has about 9 factions and definitely more than 7 units per faction.

Added 4 minutes ago

Ment, you're right, as always. They're making a game that will only appeal to old-school fans like Lok.

Actually, I'm sure the game isn't for old-school fans.
They've seen all of this a hundred times already.
There are few new ideas, and redrawn graphics are unlikely to impress anyone much. We appreciate Heroes for more than just its graphics. Besides, Heroes 5 still looks great visually, so you can't go too far with just a new engine.

By the way, keep in mind that the developers had almost 6 years between Heroes 5 and 6. That's more than enough time for a new race, new ideas, and so on.