I am not affiliated with either. I have, however, worked in the energy business.
Lumping the PUC with ERCOT is like lumping the SEC with the NYSE.
The PUC regulates and controls ERCOT, but the two have very distinct functions. ERCOT manages the deregulated electricity market. If we abolished it, the PUC would have to regulate the power companies instead. That is what we had 20 years ago.
Do you like to be able to shop for electric providers, or would you like to take what you get and pay what they say?
Maybe we could let the free market regulate both PUC and ERCOT?
That, and having any oversight positions be elected representatives, rather than (unaccountable and) appointed. With set term limits.