I do the same, except they give me an updated priority list every month, and once the priority for the month are set they cannot be changed. Misc. fixes are done eating up the time from the low priority features.<p>It removes me and my team from the losing proposition of agreeing to get something done before any other thing, as nothing of value can come from that discussion. And anyone who tries gets immediately redirected to the wiki page for the next month feature list, which opens one week before the iteration starts, by which time we know which feature will be complete and which will get back in queue.