Having lost your foothold on poloniex I think Voxels should go for a semi-decentralised exchange. Right now Lykke.com is in my eyes the leading alternative. Although they until now focus mostly on forex, they have some cryptocurrencies on there. If you could get added there on grounds of being a serious project, I think your project would grow substantially over time, when poloniex, kraken and all of the other centralised exchanges fail to be secure enough.