the rage costs on the abilities were not removed until 4.0, when drums of war was added.
It's been that way since vanilla and we've been told many times there was no plan to change it since launch. Most of us who have played for a long time have more or less given up on hoping for it to get changed. If they change them somehow to tone them down in spamability SUPER, but I'm not holding my breath. It's just another thing to continue to work around.
so no, this is a new development. a warrior spamming demo shout will prevent rogue or druid openers all of the time afaik.