Are you though? My impression is that you will smear or sneer at many of the corruption accusations, particularly those made by de Ruyter (although that may be a race issue). My view; the ANC linked corruption is to the very top levels since the very lucrative (for the ANC) Kusile / Medupi / Hitachi so there will be no "breakthrough". The inaction (or the opposite - shoot the messenger) of just about all senior ANC linked members from Jamnadas to the SAPS etc was exposed by de Ruyter.
My experience: just about every Eskom contract has some form of cost added, a great deal of which could be seen as corruption. eg. use only this security company, subcontractor, supplier, transporter, plant hire company. This is similar, for me, to dealing with business forums aka construction mafia on municipal contracts. These go to the very top of the ANC structures, certainly locally.
I do not see any breakthroughs, not significant ones anyway.