As you already mentioned the issues of buying in whole numbers can be addressed by using BNB as the payment coin and I have not faced the frozen wallet issues that you are speaking about.

Even inspite of these I would rate Binance very high considering that they have done all this in a couple of months. Give them couple of more months and they would be much better. I wrote a detailed post about Why I like Binance and why I would prefer it to other exchanges.