Goblin Slayer is off to a great start with its introductory episode and doesn't spare a moment in getting right to the action. Goblin Slayer's stoicism makes for a great protagonist in a supposedly dark fantasy genre when things get downright gory and unsightly. For the first few episodes, Goblin Slayer and priestess form a duo with an interesting relationship of an unexperienced aspiring adventurer and one who's underestimated due to only accepting one type of quests.
However the appeal and hype of the series dies down towards the mid part when a more generally appealing fantasy adventure feel and atmosphere was mixed into the story, making it almost like a generic fantasy adventure anime instead of the uncompromising style it presented in the first few episodes. Goblin Slayer's character also takes a slow dive after a while. While he is ranked fairly high amongst adventurer ranks, he seems to have been nerfed, or at least does not seem as strong as he was initially made out to be, most likely due to the need for the other characters who accompany him to be of more use and assistance to him in their journeys. Adding other adventurers is not a problem if it adds more character to the story, but in this instance it gets in the way of seeing Goblin Slayer as the skilled adventurer that he should be, combat-wise, seeing as to how he's used to slaying goblins all the time by himself before he met his companions. On the plus side, he is consistently showcased to be a smart tactician, which plays a big role in his battles.
That being said, there was definitely something lost with Goblin Slayer by bringing in more adventurers to his side. While it is interesting to see how his character develops and how he interacts with others with his personality, it also compromises his character by having to introduce others by his side to assist him and gets in the way of making him THE Goblin Slayer.