Emblems could return, but only if EA/DICE dare to impose a large fine on players who use offensive emblems, whether they be nudity or swastikas.
They don’t really have the mandate to fine a player. And even if they did, it would require a whole department of people just to manage that whole process. Which costs money and doesn’t really generate income…all for a feature they can easily do without.
I often think that players with those badges should be permanently banned from the game and have to buy the game again to play again, with heavy penalties they will think twice before of breaking the rules.
As much as I’d like to see people banned for such a thing, it never really happened in the past as far as I know. The content would just be removed. EA moderation has a very high tolerance for these things.
I suppose EA/DICE has the ability to reject obscene emblems before they're used in-game. I don't think it's that difficult to configure Battlelog so that a swastika can't be there.
Again, this would require human action to process all emblem requests or go through all emblems created. Again this would require a dedicated team to process these things. See my answer in the first point. Potentially could use AI to do this, but again, this costs money for a feature they don’t really care about whatsoever and has little to no benefit to the game.