i'm someone, who prefers wired headphones BIG TIME over any wireless solution.
And i think, no headphone jack is not that big of a deal. I have that 3.5mm Adapter from my Oneplus 6t on my headphones, so it's just a slightly longer cable to plug in.
Quality wise zero issues, with somewhat higher quality in-ears~.
Btw: I would prefer the Oled screen of the Pixel 2 XL (even with a slight color shift) over any LCD screen.
Human senses "get used" to anything. If you have a slight blue tint for example, and use that screen every day, your Eyes will adapt to that, and think this is "normal". You will NOT notice anything anymore, unless you compare it to anything else.
Everyone can check this out too, simply use a Night mode / Blue filter or something for a few Days. First, you will be like "damn, that is SO yellowish wtf", after a few days you won't notice. You disable that, and you will be like "holy shit, that is SO BLUE right now". Untill you get used again.
Short: Pixel 2 XL Display > Pocophone F1 Display.
Also, keep in Mind: Pixel 2 XL will continue to get Updates untill October 2020~. Android 10, and Android 11 WILL be available. But shortly after Android 11, there is no guarantee anymore for future updates - which is okay i guess. You will be able to use it for the next 3 years without problems.