What would you change in Heroes of Might and Magic IV?

Let's just avoid getting into arguments! After all, this is just a discussion.

I'll just say a few things about each point:
1. The number of units wandering around the map (Heroes and just armies) is still specifically limited (as in the other Heroes games), so you won't have to search for 50 of them. The Hero function has been preserved; he can only capture buildings under his faction's color and attack Castles. Essentially, an army without a Hero is nothing – just gatherers.
2. Alternative construction gives players the flexibility to maneuver in developing military units in a given situation. And it doesn't effectively put all Castles in a strict hierarchy of strength (theoretically, each Castle can become either strong or weak). That is, democracy in development!
3. I completely agree with you, VDV forever, in the tactic of adapting to MONDAY!
But still, you shouldn't be so conservative. It turns out that on this BLACK Monday, just like after the rain, ALL the growth appears in one second! In Heroes 4, there is also weekly growth, but it is divided equally over the days. This is convenient because sometimes you might not want to wait for Monday...:(

The developers made Heroes 4 unique and decided to make it so in many of its aspects! The main thing is that there were players who liked the idea. And yet, I think that it is unlikely that any Heroes fan (someone who has played all the parts and for a very long time) will call Heroes 4 better than Heroes 3.

Heroes 3 will definitely remain the best in the series for them, and WE WILL ALL BE WAITING FOR MONDAY!:)

Sincerely,
Prorock.