AS 7 Beta 1 client libs are incompatible with AS 7.0 - was discovered earlier today and reported at https://issues.jboss.org/browse/AS7-2772
Thus if we use the beta1 jars we will be incompatible with AS 7.0 - can't work with both in the current setup.
We are looking at what options we have. You can track our progress on https://issues.jboss.org/browse/JBIDE-10224