I think such an exchange will be very welcome especially as etherdelta seems finished. Main problem is getting members,and others, aware of you site. If the tokens are listed I will use it.
For new site, i would definetely aware and the hardest thing is the way we get member.
Member of trader can make the site a live. More user in the website is better. Prove the site can be good and we will believe your site.
We will try to do our best to prove that this website is good. Confidence is built only over time and we know this.