For the whole workflow you described—cuts, face blur, and subtitles—I would still use Kdenlive or Shotcut. A subtitle-only tool will not replace tracking a blur or arranging clips. If subtitles are the part making the editor feel heavy, you can split that step out: generate and proofread an SRT first, then bring it into the editor for the final render.
OpenSubs has Linux desktop builds for that subtitle step: it can generate and edit subtitles, export SRT/VTT/ASS, or burn them into an MP4. The builds are unsigned, and burn-in requires an ffmpeg build with the ass filter. (Disclosure: I’m one of the developers.)