What is your suggestion?: Remove the need for duo slayer partners to accept task skips.
Is this in OSRS?: I don't know. I've only ever done Duo Slayer in Alora.
Has this suggestion been accepted already?: I don't know but it's not implemented currently.
How would this benefit Alora?:
Let me tell my story.
Today I was trying to help user MontrellH task skip for a boss task. He is not donor+; I am. He wanted a KBD or Graardor boss task. I wanted to help him. I task skipped fast and it broke the code [bug]. He was left with a task that he had to cancel for 30 points while I had no task because perhaps I click fast.
We tried again and I aimed to click slower. But the same bug happened again. I tried logout. I tried remove the duo slayer partnership and neither of those recovery methods recovered from the bug. I still had the message that he hadn't confirmed skipping his task. He still had a task. We gave up, frustrated, and he was left with an unwanted slayer task. [Problem].
Rather than directly fix this bug from too-fast-task-skip-clicking, I think the better solution is remove the confirmation window altogether. Not only will that remove the possibility of this bug occurring but it will provide a better user experience for players engaged in duo slayer with a donor+ player.
From a developer's point of view, timing-related bugs can be notoriously hard to fix, however hitting the delete key on a single popup window probably uses far less developer time. In this case, it will result in a much better duo slayer player experience too.