Dear SSG,
I enjoy reaper difficulty I think it's actually great. As such I have two suggestions based on my experiences.
1. On higher reaper difficulty (Maybe just R10) replace the end boss of the quest with a special reaper. Currently most end quest bosses are less of a threat than say a Doom Reaper and I'd like this to change.
2. Please add yet another new difficulty for the really tormented souls out there called "Oops all reapers" where wait for it.....all mobs are reapers. It's highly likely no one will like this difficulty but ya know why let that stop you. The game needs this difficulty (or at least I think it does) for those of us that want the ultimate challenge
That's my two suggestions at this time keep giving the bad guys a real chance against the pesky hero's.
p.s. Also add a bigger variety of reapers such as Disjunction Reapers because everyone likes being disjunctioned.