You are probably misunderstanding my post on purpose. I don't mind, I backed my stance extensively and gave enough evidence so I'm not going to repeat myself. Nobody, you included, has provided any data to support their claims, whilst I have.
Another poster had the stats about 1v1s, although he stopped replying when I asked him what exactly qualifies as 1v1s, but he showed that this has been the biggest drop off in De Gea's abilities in the last 3 season, from like 66% to 33% (I'm not claiming these are the exact numbers, I'm going by memory).
Yup, that was me.
Couldn't find the definition the guy who posted the stats used for what constitutes a 1-on-1 but from the examples they seemed to be 1-on-1s as we'd know them.
You're right about the drop off but it was specifically in terms of what he classified as close-range 1-on-1s (which
I think he measured at 13.5 yard mark as that's the point his stats suggested the optimum way of dealing with 1 v 1s shifted).
De Gea went from saving 61% of those close range 1 v 1s in 17/18 to 33% in 18/19 and finally 30% in 19/20 (with the average being around 50%). Whereas he remained one of the best at long range 1v1s (saving approx 70% of those he faced in 19/20, as I remember it).
The gist of the analysis was that De Gea is very good at not committing early but rather waiting on the striker to make a decision and trusting his reflexes to make the save, which is statistically the best approach for longer range 1 v 1s. But that isn't the case on closer range 1 v 1s, where engaging the striker is the better approach. And that's where De Gea has struggled, either by shying from the challenge (as we saw in the Leipzig and Everton games, for example) or through technical faults in his block attempts (not being close enough when he drops into the block, not timing the block accurately, etc.).
So yep you're right, De Gea's general shot-stopping game has definitely declined and that's likely a big part of why. Then add in the more obvious handling errors where shots have slipped through his hands too.....
Though what's interesting about that analysis (I think) is that it suggests that technical inaccuracies and concentration are the issue rather than (as some believe) De Gea's reflexes slowing with age. I'd love to see some stats on his shot stopping in other situations (specifically more reflex-dependent ones) to see if his reflexes are holding up in that regard. Because if they are then I wouldn't be surprised if a change of scenery (new country, new club, new goalkeeping coaches, new challenge) saw a revitalisation in form on his part. It's just harder to see it happening here if it hasn't already.
It would also be interesting in terms of the Henderson comparison as it could mean that
in certain situations (particularly when reflex saved are called for) De Gea is still better than Henderson at shot stopping, which explains why so many people subjectively percieve that to be the case when watching us play. But when we broaden our idea of shot stopping out beyond reflex saves then Henderson gains the upper hand, which gets reflected in the stats.