I am completely with you on this, the word "Bangla" itself sounds like a pagan term, same goes for the name of the country "Bangladesh", just ask anybody. You cannot simply get rid of this pagan past if you use the word "Bangla" in your country's name itself!! You should find a more appropriate name for your country, a name that goes well with your identity & culture. And as I mentioned earlier, it is far better to change to Arabic language than to this half-hearted khichdi of Bangla language with Arabic script. Your country's cultural bond is tied to Arabic language, not with some silly pagan Bangla. Hope you have read my post # 45 at page 3, that was a more detailed post with reasons.
I repeat, I am honestly with you on this and you can feel free to ask me for any suggestion to take it forward, I am willing to help you guys on this in my limited capacity. Don't let the criticizing voices from your country bog you down, they will fall in line eventually and understand the benefits of going back to their real culture instead of this Brahminical farce of imposed Bengali pagan culture that they are following.