If GW2 did anything right, it was dynamic events. For those who aren't familiar with dynamic events, these were essentially FATEs spread out across the map with some being stand-alone events but most being chain events. Success or failure of these events can change the map by making certain places or NPCs (in)accessible. Example: The Pact is assaulting the Orrian homeland. First event is to escort a camp leader to the site. If successful, second event is to protect the campsite until defences are built. If successful, third event is to escort the second camp leader to the second base. Repeat. Later, the second base will fall under attack (as another DE). If successful, continue as normal. If fail, the NPCs retreat back to the first base and the first base falls under attack.

As far as I know, the only real chain FATE we have is Svara. I realise it might not be possible to do dynamic map changes, but at least having FATE chains with success/fail branches would make things more interesting, rather than "Oh look, FATE popped. Ok, done. Let's go to the other one on the other side of the map now. Oh, it failed. Oh well, next."