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In principle, it is possible. But is it necessary to reduce diversity? After all, it is generated identically for both players.
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I would like to draw your attention to some updates in the rules.
— Mirror maps now indicate 1 restart.
— The following rule has been added to the h3dm1, mt_Diamond, mt_Andromeda, and mt_Antares maps:
After the auction, the player choosing the color (and choosing the hero second) may cross out 0 to 3 heroes of the castle that the players will play as. Players cannot take these heroes as starting heroes. If, on the first day of the game, one of the crossed-out heroes is with one of the players in the tavern (with an army), a technical restart is performed.
These are the rules from the mirror map tournament, and as far as I understand, most players play this way anyway. To simplify the regulations of future tournaments, etc., this has been introduced into the official rules.
— An Overlord Halt (OH) is now considered a meeting of the players. If it occurs at a time when a restart can be taken due to a meeting, then a restart is taken according to the usual rule.
— If, after an Overlord Halt (not a disconnect, but a normal halt), the game continues, then Blue can move as they wish and is not obliged to repeat the move before the halt.
This is because, after the halt, Red's position has changed, and it is impossible to properly control when Blue can notice these changes and start moving, taking them into account (and, given a different situation on the map, it is absurd to demand that they repeat previous moves that did not take these changes into account). Moreover, when a meeting occurs during an OH, Blue is already at a disadvantage: during their turns, they see Red's position one turn earlier than it actually is, and it is highly likely that they will be in an unfavorable position after the halt.