I'm not familiar with ThemePen, his posts, or his merit-giving history other than what was shown here but I agree. I'd say every local board that has a sizeable number of active members needs at least one dedicated merit source--and I've been of that opinion for years now. It allows members who might not be able to write in English the chance to earn merits more easily and prevents the main section from being flooded with incomprehensible posts.
I am not against ThemePen's application, In fact, I support his merit source application. He is an amazing guy and helped me once with some Solana a couple of weeks ago when the minimum exchange of Solana was too high. Now, come back to the topic. I also think that every local community with a good number of users should have a dedicated merit source. When it comes to Pakistan's local thread, I always thought Shahzadafzal is their dedicated local merit source.
I could be wrong because he is active in the WO thread and he may be a dedicated merit source for the WO section. If so, I guess their community needs a merit source. I will take this opportunity to talk about Bangladesh thread as well, which has almost similar activity like Pakistan thread but we do not have any merit sources.