I have to side with
@Nyora here, the differences between DCE and Twin Energy are more cut-and-dry than Professor Juniper/Sycamore and Professor’s Research. I suspect part of the reason why PCL made that errata, along with how broken it looks on paper, is probably due to the very likely scenario of decking out due to heavy misuse by the causal crowd.
I also don’t think DCE and Twin Energy will receive an errata like that due to a similar situation happening during the early XY era: NXD’s Prism Energy and XY’s Rainbow Energy reprint were both legal for a time and while both had the same effect (providing one unit of ANY Energy type at a time) they had different limiting factors (Prism was restricted to Basics while Rainbow has its 1 damage counter placement requirement). Despite similarities and serious boosts they can give certain Pokemon neither card was banned and both remain legal in the Expanded format. I will admit there's a CHANCE for one but I’m not seeing it, neither Seismitoad or M Rayquaza-EX top tournaments these days and don’t think Twin Energy will really change that. One deck that COULD’VE benefited from Twin Energy is ZoroGarb but PCL seems to have noticed that thanks to Twin Energy’s ruling.
In the end, we’ll have to wait for the results of first SwSh-legal Expanded tournament to see if it changes the playing field.