Ist ridiculous how short the range is, you basically have to cling to the specific person to get the benefits of the aura and that is not happening 99% of the times. The players are always in movement, even a simple dodge is enough to get out of the aura range. The average distance of Players to one another is always way higher than even somewhat in the reach of an aura. Fatshark cant expect, that we all move together in perfect synchro and with the closest possible distance, which is basically a group hug.
The range has to be widen immensely. I would say as minimum a radius like, the aura centre being the chest platform in the Keep, up to the stairs leading to the bridge of shadows.