The big one is that almost all of those data sources are subject to a 15 minute delay...
That's the default. You can get real-time feeds for pretty much anything if you pay extra for it. That also really adds up BTW so only our traders tend to be permissioned for real time data.
"Before it's here, it's on the Bloomberg terminal".
Next week it will be in Bloomberg Business Week, long after it had trading value. Bloomberg has its own news collection and analysis operation, bigger than almost all US newspapers.