The reason may be, many people have confirmed onward tickets. Because, their onward departure to native varies throughout the month. However, all will be trying to return exactly on last week of May, for school re-opening. Meanwhile, today I miserably failed to get tickets and got w/l 17-19 in two minutes. There were only 4 tickets are for general passengers between panvel-dindigul...
Since, duration is about 32 hours, additional two sets of bogies can enable this train to be a daily one. However, it shares the timings of CBE-BIKANER express. So, chances are less likely to be a regular train. Atleast, this train could be a bi/tri-weekly in near future.