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

The player should be able to keep track of the turn order themselves. This ability directly relates to the player's skill. Even with 14 identical stacks (e.g., level 1 skeletons), it's very important to be able to understand or remember who goes next, especially when everyone is attacking at once.

As if remembering such things is something incredibly difficult, haha. If a creature has already taken its turn once, then failing to grasp the order... I don't even know what to say. If the issue is only this, then these things, which don't require skill, should be done automatically to avoid reducing the game to meaningless routine.

Knowledge is needed to keep track of the turn order in battle.

Knowledge? Well, that's just great. So, are there any other factors besides the unit's position relative to the top of the map at the beginning of the battle and its speed?

But again, new rounds, morale, who is waiting, who went after whom – all of this needs to be remembered, and you're suggesting simply eliminating the entire process by replacing it with a bar.

A mega-genius process. Let's also remove the turn order bar for heroes and the color of the arrows; we'll just have to remember who moved how many squares. Information about growth in the castle: why, that's an interesting process, counting how many creatures you'll have next week. And also taking into account the citadel or castle, external dwellings, weeks of plague, etc. This is where aspiring mathematicians can really shine!