This total disregard for everyone interested in this project, investors or not, is a telling sign of what to expect from the exchange (that will likely never happen anyway)
Dev has an long history of choosing not to bother posting in here or in slack even though they are lurking.
Way to shoot yourself in the face before you start.
I do agree, he's lacking communication skills, and regardless what happend to him some time ago, he should announce what are long term plans (if any).
@Banzai: if you're really doing something to complete the project, then you should start updating, since it always builds confidence.
Exchange is a serious venture, so if you're seriously thinking of it, then start building its credibility.