So far, played the two-part intro (which counts as mission 1) and the first mission after arriving in the city (mission 2). Everything has worked fine.

The launch options are only for enabling DXVK's framerate limiter, since the game itself doesn't seem to provide that feature. This is useful to make the GPU run more silently (and consume less power) in less demanding scenes. But note that at maxed-out graphics settings, in some scenes (e.g. in the city) the 3070 Ti laptop GPU won't be able to hit 60 FPS.