Government Agencies never move quickly. I feel like it's fairly common for actions to be taken a year or more after the inciting incident.
SpaceX notified the FAA on May 2nd, and launched on June 18th. that is a long window for a response, but in that time SpaceX perfomed twelve other launches, six of which were even from the same pad as they would use on the 18th (LC-40). presumably they used their old procedures and facilities for those launches, the last being six days before the incident. I can only guess that SpaceX did something incredibly stupid like decommission and start dismantling their old launch control center immediately after their June 12th launch, because the FAA would 'obviously' approve their new control center before the next launch on the 18th. and when the FAA found out that they were planning to use the new control center, they rushed the notice to SpaceX saying, in effect, "uh, we haven't approved that change yet, so stick with the existing plan."
I'm assuming that the launch poll is a "go/no-go" from launch control staff, and I don't understand why anyone would feel the need to drop that during launch prep, apart from ego.
also, while it isn't included in the notice PDF, the FAA has given SpaceX a list of options for responding to the Notice. It is telling that SpaceX's response is "We're going to sue the FAA because we violated our launch plan!"
and that's just the June launch. the July one is obviously an absurd timeline for changes to launch procedures.
it seems to me your issue is more with the FAA taking a year to settle on this course of action. I expect they've spent the last year trying to talk to SpaceX about resolutions and next steps, only to have every option shot down by the CEO, and now all that's left is to take it to court.