It would be nice if every single patch one floor was opened for free farming without the weekly lockouts. This would speed up the progression making it easier for many players to finish the raid season before it ends and also much more easier to get and gear up replacement players for static groups mid season.
To follow this season it would mean something like this:
3.2 - A5S - Opened for farming
3.25 - A6S - Opened for farming
3.3 - A7S - Opened for farming
3.35 - A8S - Opened for farming
New season -> 3.4 - A9S - Opened for farming
The current system isn't flexible enough, in my opinion, because the lockouts are too long in comparison to the duration of one raiding season and that's especially true for the later floors.