In Victoria We would not require you to upgrade any circuit wired legally and maintained for the purpose for which it was installed.
More simply if they were installed under a previous code that did not required GFCI protection, the wire still is in good condition and all you are doing is replacing the devices you don't even need a permit. A qualified person can change switches, outlets, Speed controls for fans, dimmers and ballasts without a permit.
Caveat if there are ungrounded receptacles you deal with them according to 26-700(8).
You don't have to install arc fault breakers for the bedroom but you may have to install a GFCI outlet in the bathroom if it is an old razor outlet.
If the wiring is aluminum a permit is required if you pig tail and use copper approved devices but no permit if you use aluminum approved devices.
We would not let you reduce the required number of split receptacles by only connecting a single circuit to a GFCI outlet. Since there are no split GFCI receptacles a breaker would be your only choice unless by some miracle the original wiring was 12-3 copper.
If the wiring is old enough that the temperature rating is lower than 90 degree C be careful about changing light fixtures as many new fixtures can only be connected to 90 degree wire. Permit is required to change fixtures.
