TL;DR: Nobody is waiting with baited breath for the redesign of your corporate website, so don't let minor features delay the launch.
For months, you and your team have toiled. You've planned, brainstormed, created, revised, tested, argued, tested, stressed, maybe even cried. The project is close, but there are still a few items on the list. Just a few more features, layout tweaks, and it will be perfect. Crowds will gather at their screens, gasping in amazement at this wondrous new corporate website. Or not. More likely not.
Don't hold your breath waiting for theirs to be taken away.
Why? Because nobody cares about your new website except you. And why don't they care? Because people are busy. Their time is valuable and you've never given them a reason to care before. Let's face it. Your site is not a major Internet destination. Your users are not hitting refresh, desperately waiting for something new to appear (unless you work at Facebook - in which case, forget I said anything).