There is technically a server side setting to show NSFW posts (accessed via Settings > Lemmy web preferences). This doesn't exist yet for blur.
A lot will need to be done to add client side account specific settings so I'm going to have to think about this more. I will need to think of some way to show client side account specific settings in a way that is still intuitive for users, and it's already getting a little confusing already with client and server side settings.
Implementation wise though, it's pretty easy. Maybe I just tack it on as an advanced setting and let people who really want the feature to modify them.