I (and a lot of others) have been suggesting this change for years and finally Oracle has listened to us all. Letís hope that they now do something about the RESOURCE role as well. It was rumoured that the CONNECT and RESOURCE roles had been deprecated and would be removed although I have never found this in writing.
The fact that CONNECT now only has the CREATE SESSION privilege would imply that Oracle have done a lot of testing with all of the default and example accounts that ion the past have been granted this role. Do these examples now work? - Only time will tell.
If you have previously used the CONNECT role then now is the time to start and look at the real privileges your applications need and to correct them.