Mr. Bankwell, I did not recommend the Avrukh repertoire as-it-is in his GM repertoire books. Apparently you have, on top of everything else, reading issues, which does not surprise me at all.
Switching to d4? recommended lines?

You still don't understand , do you?Understanding has nothing to do with titles.There are IMs and NMs that have a GMs understanding in chess.But competitive chess needs much more than understanding and one of them is the ability to totally commit yourself for chess.It is almost impossible to have to go 8 hours to work every day and be a GM unless you have a work that provides unlimited vacation and unlimited money(or you happen to have them).At 80's if you were born in countries like Greece , it was impossible to become GM.There were no GM norm tournaments here and that means you should travel and pay , travel and pay , travel and pay.Who could do that ?
I will repeat ,many IMs have a GM understanding and only the ignorants and the fools can't understand that.
All the stupid trolling is what is sad about forums. Go out and troll in real life. This forum should be for serious people who don't leave their house.