Love it. Decentralized is the way.
Bitshares is the way until something better comes along.

Same username and password works for Bitshares, OpenLedger and Cryptobridge. I think Peerplays too..
If it runs on top of the bitshares blockchain you can "move/ have access to your" funds between exchanges. Instead of BTC you trade for bitshares (BTS) and that allows you to buy crypto on OpenLedger, that might not be available on Cryptobridge, same goes for Bitshares exchange.

So no need to withdraw and deposit doge, btc between different exchanges. Just buy bitshares (BTS) and you use your same login and you have access anywhere