Is there anyway I could edit the text an NPC says to have it include the questers Name? For instance on completion of the quest the NPC says "Thanks '@playername' for killing those pesky mobs for me.'

Also, Anytime I try and set an initial event, save the quest and do a reload. It clears the initial event.

That is the "finish message" if I'm not mistaken. You can either edit via commands or go to your quests.yml file.

Please create a new issue with more information for your other problem.