Indeed. But, for now, we can make our own Emblems on the Battlelog. We're supposedly able to put our Emblems on our guns, but for some reason I've never been able to do that. Apparently that system is broken or currently unavailable on PS4. Sadly I don't know everything because I've been too pre-occupied with other things (PS4, etc) to bother to ask. But I hope they fix it.
As for custom dog-tags, I believe that's already been discussed....though still it would be sweet. Like if I want to put my Emblem on a dog-tag, perhaps, for starters?