Actually 4 was supposed to be a better game than 3, but there was a huge backlash against the introduction of a technologically based faction. They scrapped this idea and the game was rushed out. 3d0 went bankrupt right after.
I may do that, thanks for the recommendation! I loved Heroes 3 growing up and it's been a long time since I've played it. Might be a great time to boot it up again.
The lore for HOMM 3 is absolutely insane if you find some of the developer documents; everything is robots and aliens and spaceships and such.
That got mostly cut during development and they never went further down that route. Horn of the Abyss is attempting to bring that faction back to life with Forge.
HoMM5 is actually pretty good, but it aged worse than HoMM3 with its low end 3D graphics. 3D UI is also not as snappy as 2D sprites (also true for recent Master of Magic remaster). But the content is quite solid.