Here's the wierd thing.
Had a DNS round robin set up for the two BES servers. When trying to connect to
https://dns-round-robin/webconsole/login, the login process takes 3 minutes exactly, from time of hitting the login button (after typing credentials). This is the reason for moving the BAS off to another server.
Disabled BAS services on the primary bes (say BES01), just playing around before uninstalling, and now the damn BAS login works normally, without 3 minute delay. Seems the BAS is somehow attached to BES02 (the normal standby server) and attempts to connect to that first, when it fails, it tries BES01. Any idea if the JBOSS binds to a specific IP address and how to change it?