Yeah, it's interesting seeing how Morrison drew on Broome for his Hal characterization. It seems common for people to see how Golden Age characters were influenced by their creators like Siegal/Shuster on Superman or WMM on Wonder Woman but not much into the Silver Age characters.
Yeah, I thought that was a pretty good summation of all the GLs in that scene though like HsssH said, it's entirely easy to change depending on a later writer's interpretation. Though I felt Johns and Morrison's explanations for Hal's constructs mostly lineup.