I didn't understand the targeting system question. Took it!
Targeting system works like this -you pick a fight in the goblin city, everyone that can see you will attack you without being near the fight. Breaking immersion in my opinion but that doesn’t matter. I want strictly to share the community opinion (mine can be biased)
Thank you!
Actually you formed it bad here. If they see you attacking someone then it makes sense for them to join the fight. You mean situation where they join fight only because they share location in general, but by logic shouldn't as they have no information what is happening.
For me it seems to be bug to be honest and needs fixing. I played with it quite a lot and inside the temple most fights work properly with exception to main hall and hobgoblin Boss (everyone just becomes instantly hostile when he dies no matter what. When stealth killing Drow isn't problem at all). Most times only small group which was taking part in action joins fight and then they try to start the alarm, so they run to the nearest drums. I had no problems with stealth killing 2 goblins that try to push guy into spiders nest without alarm, same for Spike and Shaman. Sometimes it even goes nice like in case of goblin that talk about Wyll and ways to kill him, the ones in next room will join the fight if by chance they will notice it mostly by coming too close to hole in the wall and seeing the fight.