I doubt if anyone used to travel in trains like Lal Quila, Janata, Upper India, Koaa Anvt all the way till Delhi. Those trains used to serve as a connection between intermediate stations.
And Dakshineswar is very much within KMDA. It's completely unnecessary to provide halts to such long distance trains just for the sake of few localities.

---

Bandel, Naihati also falls under KMDA!!! Then why Main line bound expresses gets halt at Naihati and Bandel?????

---

That's simply because both Bandel and Naihati are important junctions too. The whole Nadia district and Katwa subdivision of Purba Bardhaman are dependent on these two stations. Had they not been such important junctions, they wouldn't have recieved halts of any long distance train. For instance, just look at Barrackpore or Shrirampur. They are way more important and bigger cities than Bandel but still they dont get halts of the long distance trains.
Dakshineswar, on the other hand, serves only a few localities of Kolkata like Baranagar and Dunlop. On top of that, Dakshineswar has metro connectivity which makes transport way more easier than the other aforesaid stations.

---

Now tell me for what logic Maithili Express got halt at Dakshineswar?

---