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Don't say that; in the 5th installment, a new system was introduced: initiative, unit movement ranges were added, and each faction received specializations. I think the developers were simply afraid to add too many new features to the 5th installment after many players didn't like the 4th installment and its innovations, so they decided to bring back the beloved 3rd installment with minor changes. But I think the 4th installment turned out pretty well; yes, there are some flaws, but the fact that it introduced many new things is a good thing. I think the 6th installment should also add something new, but not go overboard, so as not to deviate too much from the beloved Heroes system.