Not too soon I'm sure. But tradeorge is doing a great job now. Before I stuck only to soutchexchange but now I see that tradeorge has 10 times more volume.  Of course bigger exchange would be much better , coin would grow significantly but I dont think it is so ease to do. It cost a lot and who is gonna pay for it if there was no ICO or initial premine to cover such a costs? As a matter of fact, We may never see such thing like bigger exchanges..