Also, for what it's worth, I find swiping up to be easier to do one-handed on large phones.
As I said, swiping up actually feels easier to me on a large screen than swiping left or right. And putting notifications on the lock screen is a critical feature in my opinion, something Android has desperately needed out of the box for a while now. I use a custom lock screen just for that feature because it's so useful.
It's the swiping that I'm specifically disliking. Every time I swipe to the right it opens up the phone app. Probably there are many users who have formed a really strong habit of swiping a certain way to unlock their Android phone. I would bet on that direction being left-to-right.
Do you know if it's possible to change the way the lock screen handles swiping in some settings page somewhere?
While it's useful having shortcuts to do these things, they've gone far too far and made it too hard to do what you most often want to do, which is simply unlock the phone. The old photo button worked well, for example.
They had also previously used "up" on the lock screen for voice commands/google now, so I for one have learnt never to use "up" unless I want to set a timer using voice (pretty much the only useful thing it can do).