It is not our intent to demoralize and beat down the realms of eastern Dwilight. That is an unfortunate side effect of the fact that balancing monster spawns is surprisingly difficult. Making sure that they're strong enough to be a danger, while not strong enough to threaten your very existence, is a very, very tricky balancing act.
I've been taking some steps today to see that the hordes in the east will not be quite as threatening, but I think I may need to do some more still.