Spoil is ok, as far i checked on low level mobs - my recipes are spoiled as expected (cbp, steel, cokes, synth cokes, durable braid etc).
Sligtly low adena drop rate.
Bugged quests, not only in reward but hints/status as well, not all, but some.
Some monsters have a extremely low exp/sp rate, it is obviously bug (for example - dwarf village northern area, Northern Tridens and mobs around - wolfs and bats, around 100XP and 2-3SP)
In my opinion most of complainers are players from high rate pirate servers, but yes, bugs exists.