On the contrary, I totally understand your concern. Dumdum is my second home (literally). So I know how the situation is. Not only that, even before I started staying at Dumdum, I always have thought this station is neglected considering this places' historical value. Also this station has a close proximity to airport and a direct metro connectivity. So I do think that DDJ deserves some Express halts. But still I am not sure why ER doesn't provide halt here. I need to find out that answer first. It will be helpful if you could put some light on it.