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This is explained by the fact that I prefer to rush forward and crush the opponent while they aren't too strong. In Heroes III, this didn't work: by the time you arrive, you lose half your army; plus, the opponent can flank you.
- because of this, I see three clear drawbacks in my opinion
1 awkward camera (this is a necessary minus of three-dimensionality (but I'm not saying 2D is better than 3D since the combination is better in strategies, i.e., 2D terrain and 3D moving objects, units, creatures - IMHO))
2 small map sizes (much has already been said about this)
3 for me, perhaps the main thing is the terrible interface (no matter how much people spit on 4th, they had a classic one with improvements