User blog comment:TheBlueRogue/E3 2013: Ask your questions about Assassin's Creed IV: Black Flag/@comment-4829046-20130611024208/@comment-3046679-20130611143702

Anon, I'm guessing lack of hud is there because new one wasn't designed yet, and they're still using AC3 one at this point, and didn't want to show it, people would get confused.

Notice how the enemies still have AC3-esque white outline around them, even though it should be different considering we're using Abstergo Animus to view Ed's memories. Perhaps a slightly updated Animus, but still different than one used by Assassins.

Speaking of, I hope the AC1 health system will return, as in it would regen on its own, but you can upgrade it. This was a major bullshit in AC3 with lack of health upgrades, especially with glitchy combat when enemies randomly ran at you and swung unbolockable musket strike last second.