Round-based durations are broken

[RedOrca]

I'll not bury the lede. The rules for round-based durations should be changed to:

Proposed round-based duration change wrote:

For an effect that lasts a number of rounds, the remaining duration decreases by 1 at the start of each of the current participant's turns.

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Effects with a duration of 1 round make perfect sense when you create them on your own turn. You cast courageous anthem and when your next turn starts, the spell ends. Simple.

A problem arises when it's not your turn. Consider the gnome feat Unexpected Shift. As a reaction when you would take damage:

Unexpected Shift wrote:

Roll a DC 16 flat check. On a success, you gain resistance to all damage equal to your level against the triggering effect, you gain a +2 circumstance bonus to saving throws against that effect until the start of your turn, and you gain the dazzled condition for 1 round.

You are "the creature that created the effect" by using your reaction, so the dazzled condition ends at the start of your next turn (meaning it would very rarely matter). The +2 to saving throws ends at the same time, despite the difference in wording.

And finally, the reason I brought this up: Flash of Grandeur. Before the recent errata, the end read:

Pre-errata Flash of Grandeur wrote:

For 1 round, the attacker is affected by revealing light.

That meant that if your champion happened to act directly after the enemy, Flash of Grandeur (and the accompanying feat Brilliant Flash) had far less impact than if your champion happened to act directly before the enemy. After the errata, it's now:

Post-errata Flash of Grandeur wrote:

Until the end of your next turn, the attacker is affected by revealing light.

That's technically a buff, though it will only matter if the target is actually invisible, or if your champion provokes a Reactive Strike or is a fan of hiding in plain sight. And since Brilliant Flash wasn't errata'd, the target still isn't off-guard during your turn.

So please, Paizo, change the rule at a global level and be done with it. I didn't even cover Delay Consequence, a spell that ends before the caster's turn starts that can also be Dismissed for some reason.