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

The intelligent transfer mechanism is not bad, but it doesn't take into account the realities – after all, different situations can occur. As a result, you're left with a Silver Pegasus when you need a Centaur to remain. Or a Wolf Rider (gray) remains instead of a Hobgoblin. You have to adjust everything. A new mechanism with a click on the desired unit would be more practical.

That's why I thought that with this new feature, the usefulness of the general transfer buttons becomes minimal, so I suggested considering changing or improving their functionality. Perhaps the size and clarity of the icons on the general transfer buttons, as well as the fact that you don't need to touch the keyboard, will remain some advantage, but compared to directly selecting a single unit, it's all insignificant.

I dumped the whole pile, and then changed it if necessary; it will be easier for me than planning the transfer, taking into account a complex algorithm.

The point of the complex algorithm is precisely to avoid having to worry.
However, there is a dangerous moment here – to over-automate and partially take away the player's need to think.
For example, here's an idea: when leaving a single unit, the algorithm will take into account the terrain on which the hero is standing.

In general, in connection with all of the above, I even had the idea to make it so that the weakest creature is left (that is, to simplify and make the algorithm more "stupid").

Full/partial exchange of artifacts, doll/backpack – yes, that should be done...