Conservative fans is a shitty excuse. Just look at Civilization. People bitch about hexagons and one unit per tile to this day yet Civ5 was a huge success. People hate Civ6's art direction and districts yet it's more popular than ever. The majority of grognards will bitch and moan yet they'll still buy your game in the end. The key is to actually deliver a product that isn't absolute trash. Something HoMM has failed to do since V. Six and Seven failed because they were bad, soulless games with no real value to them.