There was a lenghty discussion in World of Warcraft when they attempted some changes and I think some points might be interesting in the discussion for Deadfire too: https://us.battle.net/forums/en/wow/topic/20758896817
Fundamentally from what I understand from the whole issue:
- Most players want Windowed Fullscreen: namely the ability to still use Mission Control to quickly switch back and forth from game. PoE1 lacks this capability and players have to resort to switching back and forth from fullscreen to windowed. I find it not good enough compared to Mission Control.
- Windowed Fullscreen means the game window resolution must be exactly the same as the native resolution. If the screen is 2880x1800, the game window must have a 2880x1800 resolution.
- For performance reasons this is not always ideal, so the game should be able to render internally at a lower resolution even if the game resolution is higher. WoW provides a “Render Scale” option to configure this.
- If the render scale is too low, the game appears blurry/jagged even if the game window is at full resolution. A good compromise allows the best of both worlds, with sharp game graphics and text and reasonable performance.
As example my WoW configuration is Windowed Fullscreen on a MacBook Pro 15” with Render Scale 0.7: the game window is managed by Mission Control and is a fullscreen window running at native resolution 2880x1800, but the game internally renders at 0.7 of that, 2016x1260, making performance good enough but still providing sharp graphics and text. The game has no menu, dock nor window decoration but I can still 4-finger gesture mission control or swap away from it.
TL;DR: If any change has to be made I’d like Deadfire to take inspiration from WoW’s Windowed Fullscreen implementation.