No, I don't think there is a need however they should really try to improve the current exchanges that are present and should hire more support to answer all concerns right away.
I'm thinking that there's a need for a lot of new exchanges. As a trader, it's an advantage to have a lot of exchanges in our own choice.
Let them take the competition and beat each others services base on the satisfaction that they can give to the gamblers. I did noticed the lack of supports but not all of them does have a very poor support though.
Sometimes we are just in a hurry and while waiting for an answer to our query, we are rushing it and can't be patient anymore. I did addressed some problems with popular exchanges before and I understand why they are replying late and this is what they should consider.
I agree on the same thing which I do really much prefer to have a lots of exchanges so that as a trader we do really have lots of options on where we would decide to trade. Competition would really be here since lots of people would really decide to make their own exchange which this kind of business is really profitable if you did able to get the trust of the community. Support is one of the most important thing when it comes on this kind of sites because people do really like to have a fast and responsive support on any sites that they are using.