A lot of people loved the LG V10. It is a nice phone with solid build-quality, good amounts of durability, audio-chops, superb camera features and more. Frankly, it's a phone that has its own basic formula that people love.
That's why for the V20, I would like LG to stick with the basic V10 formula of that build quality (keep the rails and rubberized plastic removable back), keep the durable material choices while either keeping or enhancing the excellent 32-bit DAC and strong amp plus excellent camera package, all while sorting out the flaws with the V10, like giving it a larger battery that can still be removed.
What I don't want to see is "G5 Logic". By that, I mean I don't want to see a drastic overhaul. The V-line has already established a fanbase that love it for what it is, so I don't see any reason why LG needs to change it up drastically. The V20 doesn't need "Friends", nor does it need a "micro-dizing" finish on its back with primer plus paint and all that. The V10 in its basic form is just fine. Instead of drastically overhauling it, they just need to refine it.