What res monitor you got? I've found it to be way, way more effective at 1440p than on my old 1080p monitor. But even on the 1080p monitor DLAA (native) looked good.
Yea you'd benefit hugely from DLSS, even Quality mode. Though I don't know what the pixel density is like on a huge superwide monitor like that. Seems it's more useful with higher pixel densities.