I hesitate to write this post because we far too often have the opposite problem, authors who take their hastily written deadline-driven conference submissions and just put them out on the web in its messy state. But aiming for that impossible perfection in the exposition spends considerable time making tiny changes to an abstract that, in most cases, no one would have noticed. One can better spend their time in other ways, like doing research for the next paper.
So take a little time to clean up the conference submission but then don't worry about every little detail. As soon as possible make it available for all to see. If there are problems in the exposition, people will let you know (especially if you fail to cite their research) and you can fix the paper accordingly. Psychologically you will feel better getting that conference submission you had spent that hard concentrated effort on out of your mind, until it (hopefully) gets accepted and you have to work on the proceedings version.