HE:C (without parameter #4/#5 for stack exp) is counterintuitive in exp management

If you use
to multiply the number of creatures of slot 0#, you would find that the stack exp of this stack is halved.
This is because ERA tries to keep the total exp of this stack, and thus, the exp of each unit is recalculated after the HE:C execution.

It makes sense to some extent, but it is counterintuitive. Judging from existing scripts in the old WoG Scripts mod, nobody realised how HE:C works. These are happening now:
- After choosing a henchman for your hero, the stack number of the chosen stack is reduced by 1, yet the total exp increases.
- After sacrificing a few creatures in Emerald Towers, the sacrificed stack has increased stack exp for each unit

The better implementation for HE:C (without parameter #4/#5 for stack exp) is, when it sets the stack number, simply just set it and keep the stack exp for each unit the same before and after setting. This suits every script I've seen in multiple mods.