He just ins't an AAA game developer. He never was and never will be... GOW might have been his idea, but it was Sony's money and other talent that made it what is is today.
The GOW series went to crap after Jaffe left, the sequels are pretty bad. Much of the fun of GOW was juggling enemies with L1+X, but that move was taken out in the sequels. And, the 1st GOW had a much better story and much better puzzles. GOW cannot stand on its simple battle system alone, it needs the story and the puzzles, and the epic adventure, which doesn't feel epic when the story and main character are crap.
"Half of writing history is hiding the truth" - Malcolm Reynolds - Serenity