Pretty much my feelings as well. I wasn’t previously a fan of the new trend towards ‘tall and skinny’ but after using both the X and Pixel 2 XL, I don’t dislike it as much as I thought I would. I don’t love it but I’ve adjusted. There a few games I play that are in landscape orientation so that’s where I feel the squished screen the most.
The notch has pretty much just disappeared for me. In fact, I like how status icons can be placed in the ears and allow more content to push further up. It’s less than ideal in landscape but again, not really bothering me. Of course YMMV.
As far as navigation goes, I absolutely love how it’s all gestures now and they’ve become second nature for me. If you didn’t see the front page post about 6 key gestures, go have a read/watch as they make a huge impact on moving around the UI quickly. In fact the biggest problem I’m having with the new UI is that I try using it on older phones and tablets..have to actively tell my brain to switch back.
FaceID also took some initial adjustments but I have to admit I was wrong about my initial resistance to it. It’s now already second nature and often don’t even think about it..it just happens. No, it’s certainly not as fast as TouchID, mostly because of the need to swipe to open but I’m finding it plenty fast enough. I also think it has been improving/learning as I use it more. I find it seems to be working better off angle that it initially did—could certainly be imagining it but I just don’t notice it unlocking anymore which means I’m also not needing to pay attention to how I position the phone. I’ve also used Apple Pay a bunch of times and it was every bit as quick an experience as before with TouchID.
I hadn’t intended on upgrading but of course, I had to try it

and now think I’m likely keeping it. Dammit...