I understand changing the script may help us in learning the Arabic script more, but how on earth does Urdu help us learn Arabic more? The language sounds similar, if not identical to Hindi, only difference is the script. Urdu is not a pathway to Arabic, similarly, Pashto or Kurdish is not a pathway to Arabic even though they use the Nastaliq script. Majority of Bangladesh can read Arabic, especially Quranic Arabic, in fact we are usually one of the countries to win or come second in the International Qirat/Quran competition in UAE/Dubai.
I love the Arabic script, but the thing that holds me back is the timing, it's too late to change the script or even the audacity to propose a change. Musulmani Bangla is still here and enriched with Arbi and Perso words, what makes me worry is that the Islamic heritage of Bangladesh is being thrown in the ashes by current regime, especially Bengal being one of the first regions in South/South East Asia for the advent of Islam to occur.