Before the new system, the county championship was run on a divisional basis with the teams in the divisional finals going into the county quarter-finals and proceeding from there. It may not be long before this system is re-introduced because of the complexity of the current championship.
Prior to the new setup, the county championship was conducted on a sectional basis with teams advancing from sectionals to quarter-finals and proceeding accordingly. It's possible that this approach will be reinstated in the near future because of the current system's intricacy.