OK, I understand the situation - you wanted the FATE for something and it was over before you got there - just in time to miss it! But, why would you expect people in the middle of a FATE to a) see your shout (I disabled shout a long time ago personally) b) respond or c) stand around waiting while enemies wail on their level sync'd butts.

You seem to be expecting a bit much. This reminds me of the whole early pull thing for hunts. Hunts are open world, first come first served content. There is no early pulling. FATE are open world, first come first served content, there is no 'premature completion'... There is no 'Wait for me, wait for me' entitlement.