Do Fast Shot trait affect bursts?
no, not anymore
Do bursts always hit torso?
they use "unaimed" part of crit table
some players may confuse you because on (*other server*) are bursts using torso instead
Do bursts have the same % chance to hit body parts than Fast Shot trait?
bursts cant aim to any body parts
What's "Unnamed" (It's a 20% hit chance on fast shot trait)?
unaimed, not unnamed, like normal shot without aim
mad matt explained more detailed in post below
Do bursts take your critical chance without modifications? (For example, 10Luck and 1 Even more criticals (equal to 20% crit chance) ~20 out of 100 bullets will become "critical shots)
what modifications ?
when you have 20% crit chance it doesnt neccessarily mean that in average 20 out of 100 bullets will crit because there are some other things that change your crit chance like target armor crit chance modifier, hidden bonus etc.. but yes, luck and even more crits does affect bursts
Do creatures have -% critical hit chance?
that is a good question, i am not sure but i dont think they do
human npcs probably do though since they are wearing armors which have -crit mod
i know some creatures (or npc in general) does have a perks like for example man of steel but that does affect only crit roll, not crit chance
but thats probably question for someone like mojuk, he is a god when it comes to reading code of game mechanics