Too Long; Didn't Read
There are plenty of people who might need some help from you: VFX artists, tech artists, level designers, quest designers, GIT, etc. You need to delegate to keep the structure working and to have time for more important things. The team leader is the person who is the strongest developer in the team. It's very rare that a team lead is a mediocre developer with managing abilities. And they often take the promotion even if they don’t have the required skills.