Decisive Attack
When you make a melee weapon attack on your turn, you can expend one superiority die to deal an extra X damage to the target. If you miss, the target still takes this extra die of damage.
When I first saw it I also thought it wouldn't compete with precision strike. I'm thinking more like this:I'll quibble that it doesn't sound decisive, at all. And as a pure DPR benefit, it'd have to stack up to precision strike.
But it's a reasonable sort of idea.
Decisive Attack
When you make a melee weapon attack on your turn and spend one superiority die on that attack, you can expend one additional superiority die. The target takes this extra die of damage and the affect of the first maneuver regardless of whether the attack hits or misses.
It's a specific exception to the one maneuver per attack rule, but it costs an additional maneuver known plus gives something interesting.