Martin manages his time across departments carefully and we haven't seen a lack in the quality of his management.
I understand what you're saying but Articles would need to be ran by someone who is able to manage a content-based Department and who has a strong history of doing so. Why not the current News Manager? Both the Senior News Reporters (I think) worked in Articles too. I don't see a problem. Of course, on the website, it'd go under an Articles header but in terms of Management, Martin is the best guy.
Having anyone else would mean them having to get used to the role, learning the ropes, having a team bought in. It'd take a lot more time and effort which could be spent on getting Articles reintroduced. Then, over time, depending on popularity it could be phased out.