I totally agree. There are so far several niches where the description could be done better. The "oil or life" niche is a good example. Although I voted for this niche, since I suppose I know what the topic should represent and it is generally ok for me, I would really like to see some possibility to modify the niche description (only by its creator) after it was proposed and possibly discussed by other members.
At the end, there could be people who are also interested in a niche proposed by someone else and it can undermine their motivation to bid for that niche if the name or description are not done clearly.