Based on the 2nd pic where it's easier to see how deep into the flight plate the thumb is, looks like it's ~medium depth to me. Extra thumb pressure might increase the urge to pronate in that position.
I'm curious to hear if you feel what I'm talking about: press really hard with the thumb, do you feel the outer wing have pressure to be pushed down? That pressures you to give into pronation to relieve the pressure which I'm confident increases risk of nose up if you do pronate (if I turn the key
hard I can get to ~-10 nose angle, but if I pronate a
medium amount I get ~+20 nose) so it takes less pronation effort to get a bigger impact on the angle from what I've found and is probably part of why it's so easy for most people to accidentally throw nose up.
Then to compare, try moving the thumb to be on the seam where the flight plate meets the rim. Press really hard with the thumb and feel there isn't that same pressure to pronate, which to me means less risk of pronation all else equal (still might have muscle memory to do it though).
On mids it feels like your thumb is really close to the rim when you put it on the seam, but putting it on the seam keeps the pinch point between the thumb and index more consistent feeling between mids and drivers, imo.
For people who prefer to have the thumb deeper into the flight plate, I just think they have to be more careful to not use too much thumb pressure, otherwise they have to put more effort into resisting pronation.
In terms of how far your thumb is in front of your index finger, I don't think it's that far in front but your index finger looks kind of cocked back so it seems like it's further behind than where the index contacts the inner rim. It's 'normal' when the thumb is on top of the index finger for it to partially extend a bit ahead of the index.
When I talk about the thumb being further in front of the index finger when changing grip alignments (Intro grip vs Throw 3 in the vid) this is what I mean: