I don't believe there's an airline in Australia that would use an IFR pickup or VFR climb procedure to enable climb into class E. The airline I work for expressly prohibits us from using these procedures.
The airline I work for also bans VFR.
There are also people who use charter aircraft who demand IFR only, making such a procedure useless.
I think the penetration of Class E in this instance at Williamtown probably has more to do with poor depiction on the charts of the class E airspace than anything else.