Just remove all price controls from areas with fiber and let the price go up and up and up as people come off it and the fixed costs of the network have fewer connections to distribute over. That will speed up places axing their old fax lines, legacy phone systems with basic rate lines, and antique medical alarms with no cellular in them.
Not fair to expect chorus to keep the lights on for the cabinets and exchanges when there is only a minority of people using it and lose money as a result.
It will go up and up in Auckland
And down and down in Tauranga, Hamilton and Christchurch so try and keep people and under cut the local LFC
Which is why it has not been allowed, where the keep copper the current regulation / price stays in force.