The problem with that is the pending task we put in queue normally go to a sprint. We could put more in the queue for people to request but then the team is not at a ready when we are ready to kick off another objective as a unit.
I am essentially suggesting there be two tracks: a sprint track and then a wish task. The sprint track would have a deadline and the wish track would not. We would also wanted to make it clear that the thing from the sprint track are the priority. If they didn't get something from the wish track done by the end of the sprint or they dropped from the project before submitting the wish. It would have a low impact on the rest of the project, because things on the wish track should all ways be low priority. If something on the wish track becomes a priority it they should be move in to a sprint.
As a general note, we don't seem to handle things that may span multiple sprints well, which may be a sign that long-term objects aren't well defined.
Yes this slow some of us down but it also keeps all of us in sync and nobody is running around crazy like doing things that maybe outdated by the time we get to them because of the time we spend researching and moving forward.
I think assigning people any more then the 5 hours in a sprint (given our project structure), would be set people up to fail. I ran into a little bit myself with the last sprint. I completed completed two task then got stuck on third one, even though in no way was the third task system critical nor did it really need to be 100% done by then end of the last sprint.
To be honest, I am also a little concerned about by the statement "things that maybe outdated by the time we get to them." Nothing we produce during this project or any project will be 100% by the time they are ready ship. There we be mistake made but can't be going back and constantly fixing them or will never get anywhere. That's not to say there can't be improvements, but improvements should be done with consideration for overall project impact. Overall the focus at this phrase of the project should be just to produce something.