I think adding FSR would be even more important, because anything that can run DLSS should be fast enough to run BG3 without it.
But FSR would make the game enjoyable for people with potato GPUs as well.
Last Change in steamDB for DLSS was yesterday. But that proves nothing.
I could use DLSS because my Rig I5-4670k +RTX2060 6GB is running on its limits and with all settings up even with some lower in the shadows and ligghting department i drop down to 25FPS in some areas.
The more NPC the less FPS. CPU is bottlenecked by GPU and more NPC is allways heavy CPU usage.
So for my wishfull thinkin DLSS will give me some more FPS even with a bottlenecking CPU.