The fear reaper aura seems much fairer to me this time, compared to the last build.
On the last build it would hit you for 2k on the first tick. This time it slowly builds up instead. The damage per tick on the first stack was only around 20-30 damage. A 15 stack would tick for 600-800ish. Getting to 15 takes a good minute. How long was that reaper alive in your case?
Reapers can be CCed and even instakilled.
If a fear reaper is in a bad spot (behind a wall) it could really screw you though, since the aura seems to have no limit in range and goes through everything if in LoS or not.