HoMM3 HD is a mod (add-on) for the game Heroes of Might and Magic 3.

Okay, I agree. There won't be any options. Or rather, there will be one: "SOD gameplay/no SOD gameplay." It's easier for me.

The inability to peek and cheat with artifacts = no SOD gameplay.
The inability to view the map and save files (when implementing password-protected saves) = no SOD gameplay.
Changing the timer's operation = no SOD gameplay.
Displaying movement points = no SOD gameplay.

Inviting a hero in single-player, healing the map, choosing alliances - let's consider these as SOD.

Regarding roads - I don't know. Level 2 - probably not SOD after all.

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I came up with something regarding the chat log. It can be written to the save file (while maintaining compatibility with SOD) - it should be easy to implement. It would be convenient, and it would be quite difficult to fake the chat. Especially if it's written to the save file in an encrypted form (even with the most basic encryption).

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HD+AdvancedSOD won't disappear, don't worry.
However, everyone understands that pure SOD is not perfect. Supporters of only-SOD don't accept TE/WT because they don't want to replace one traditional, albeit imperfect, feature with another, controversial, imperfect feature.

Why not create a separate mod with very balanced, cautious, and subtle changes, even if there are only a few?

Someone might ask, why shouldn't I devote my efforts to developing and improving, say, WT? Why do I need to create my own mod with blackjack and... well, you know? I answer: I don't like everything based on the WoG engine not only because of its radicalism, tastelessness, and mishmash (even if it's minimized in WT, it's still there), but as a programmer, I also don't like WoG solutions; I just don't like this platform and its implementation in general. And I want to make an already great game even more perfect.