Heroes 5.5 WarGame Edition - Tactical Edition.

Yes, but we need to finish working on the old stuff first, and then I'll start exploring the new technical possibilities. From what I saw in RTA 2.0, nothing particularly interested me yet, except for what has already been implemented in the new executable file.

Well, personally for me, the main benefit of the patched executable is the operation of combat scripts in Multiplayer. And with the help of scripts, you can add all sorts of things.
By the way, the change to Chain Lightning, which you complained about on HL, is a separate patch for the executable that you don't have to use.
And they made quite a few different patches. For example, this one: