Username: Spiral
Suggestion: The capability to spend slayer points to extend the currently assigned slayer task.
For example: spending 100 slayer points to extend the currently assigned slayer task by 20-30 kills (10-15 for bosses)
Why (how will it benefit players overall): Having the option to extend slayer tasks would enable people to train slayer faster. It would also provide a greater benefit to having a slayer helmet.
Reassigning a task 10+ times to get a specific task can be quite annoying, with the ability to extend a current task people could get more value out of spending points; while also expediting the process of getting slayer exp. It would also make the slayer helmet a lot less useless overall and make the point purchase to make it less unsatisfying. It wouldn't help people farm points (obviously :P) and would also make slayer point items like the cannon more rare with less points being available overall in the long run.
It would make certain lesser bosses easier to farm with a slayer helm (like gwd bosses). People who farm harder bosses have better options than a task enhanced slayer helmet anyways. It would make certain low level bosses more viable for newer players and encourage them to stick around longer.
Just a thought
EDIT: I know this is a repost of a recent suggestion by Masoud, but I feel I've provided more of a justification for the change rather than just asking for it ^^. Will understand if this gets deleted as a repost