Yeah, GCam may be the way to go. The only thing I lose then is the full resolution storage.
I hate the Pixel launcher, I use Nova launcher on my Pixel 2. I also don't care for this bland material design 2 look Google is forcing in their apps either. And then there's the gesture navigation they are apparently forcing you to use on the Pixel 3.
I think I may have talked myself right out of the Pixel 3.
Pixel 3 XL: made by Chinese Foxconn, very huge and ugly notch with no customizable options, lacking a headphone jack and micro SD slot so you gotta pay a lot more for onboard storage, only 1 rear camera (no fun), no themes you can install, weird "squeeze" feature you might accidentally trigger, back is made of curved glass entirely and is extremely fragile (YouTube reviewer cracked it by accident).. no drop test standard certification so if you drop it, there goes $900, no manual controls for photos/videos
V40: made in Korea, notch looks nicer and can be customized or turned off completely.. has a headphone jack still with a Quad DAC for the absolute ultimate music listening experience, has 3 omnidirectional mics for the best audio recording experience, BoomBox sound which sounds nice and loud thanks to the sound chamber inside, micro SD slot (plus free 256GB micro SD card if you pre-order early), free $138 value gimble with pre-order, no annoying curved screen so you can install a glass screen protector, 5 camera setup with the newest IMX363 with dual pixel technology, incredibly thin and lightweight design, still has MIL-STD-810G and has been drop tested and less fragile than other phones without it, dedicated Google Assistant button so it's easier and better than Bixby, possibly the best manual mode camera for pictures and video recording