"I would suggest using an ETH/BTS market from one or more reliable gateways. By reliable, I mean a gateway where the deposit and withdrawal paths for ETH are operational. "

What give as the guarantee that they remain reliable and they will not stop deposits/withdrawals at any point to get advantage of the "new" mechanism?

Would it be not better we use multiple bts/bitASSETs dex pairs (+ bts/gateway-ETH if so important)?