On the subject of Railways, is there any plan to add the Athens (GRC) Metro and/or trams?
Yes, but not this week unless someone that isn't me adds it (I don't care if I'm gazumped here).
That said, I added Kuala Lumpur instead of Athens (which I had planned to be the next city I drafted). But as there's demand, it would probably be a job for next Monday (after I get back from holiday).