This has been debated a lot of times already..
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Case-1: Towards SC: two MEMU's originate from WL daily and lot of intercity trains pass through to SC. However there is definitely a demand in the day time for an additional exp/pass like KZJ-SC-TDU or something.
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Case-2:...
more... Towards Ballarshah/NGP: NGP pass and other trains already in this route
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Case-3: Towards BZA: lots of daily intercities and other passing trains.
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To Major cities: AP,APSK have KZJ in GNWL quota for Delhi and a couple of Trains have GNWL for MAS,two trains GNWL for HWH,and one train GNWL to Mumbai..KZJ has no problems as of now as far as connectivity goes except for Bangalore.
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I totally agree that the infra is not being properly utilized, maybe YPR-KCG-YPR exp should be extended to KZJ with introduction of a new bi-weekly between KCG-VSG which never happened although people were expecting something close to that of late. Nevertheless, considering a normal passenger from Warangal city,travel would be frequent to either Hyderabad,Khammam,Karimnagar or Nizamabad which need to have trains from WL. Hopefully after the completion of BG line between Armoor-Nizamabad, KZJ might see new pass.exp trains between KZJ-KRMR-NZB/NED/CSTM/MMR side...Fingers crossed!!