Max looked much better in his last two quarters of football (3d Q Minnesota and 4th Q TCU). It would be hard for anyone to be as bad as Gio the last two games. I think the floor with Gio is much, much lower - even if the ceiling is potentially higher.I think you're probably right about Gio, but you're way overrating Johnson imo. He's decently athletic but he's so slow to recognize pressure that it doesn't matter, defenders gain too much ground on him and he takes a bunch of sacks and it's why he's gotten injured every single season he's started as a college quarterback. His career pressure-to-sack ratio per PFF is ~18%, compared to Lopez's ~12% - 15 is about average. And his downfield processing is just as bad; the primary issue I had with his tape when he transferred was how long he held on to the ball even when he had open reads.
Johnson's one advantage over Gio right now is that he can make some timing throws, where he doesn't have to read a defense and the ball's location is pre-determined, with regularity to the short and intermediate parts of the field. Similar to what we've already seen, that's good for a scripted series or in garbage time, but a defense can pretty easily adjust to him after a quick look. the ceiling and floor for this offense are much much lower if he's named starter.
I mean Gio had a 1.9 QBR against TCU. A 1.9. That is almost impossibly bad.