The eTX will need to shift just as fast as the eGR for me to consider it. Wheeltop's full wireless GeX shifts a bit slower/clunkier compared to eGR's wired battery setup. Not sure if that's a Wheeltop thing or an advantage of wired battery rear derailleurs?
I would imagine it to be more of a wheeltop thing on the slower shifting, since the derailleurs aren't wired directly to the shifters but just the battery. My new ER7 shifts a bit better than my gen 1 erx, the FD is significantly better.
I bet they will do the classic China full release and we'll have to get lucky getting it from random ali vendors.