Suppose that a DM realizes that the PCs became OP due to several reasons (optimization, lucky rolls, too many magic items) and battles that are supposed to be deadly became easy. Then, he decides to design battles with more powerful enemies (i.e. higher hit bonus, more HP, more damage per round). Things seem to be balanced again, but there is a problem: the equilibrium is more fragile than before, because due to the great power on both sides, some lucky rolls can end the battle very soon.

I am providing an oversimplified example with 1 PC against 1 enemy: in the initial situation, both have 100 HP and deal 1 damage per round. After the overpowering on both sides, they have 100 HP and deal 50 damage per round. It is clear that, although the battle is balanced as much as before, the equilibrium is less robust.

**Is there a name for a problem like this, which I suppose is pretty known, in the RPGs context?**