Sorry, didn't mean to double post. The mobile site is not very intuitively laid out.
The people thinking this is intended are missing a few key points.
1. This FATE, while exploited, awards twenty times more XP than any other FATE at this level.
2. Players who attempt to complete the FATE in the intended manner (competing objectives) are harassed by people exploiting the FATE.
3. Other FATEs with similar mechanics do not have the mob density and respawn rate that this FATE has.
All signs point to this being an oversight, unintended, and an exploit.