I didn't take it as them (Binance) saying which coins they were going to trade, they just kicked US based users out. Though, from what I read, you will still be able to transfer them out after that date, just can't buy or sell em any longer.

Now, if you are talking about the US compliant exchange they are building, and which coins it will hold, you may be correct in that some of those coins are no longer available.

I can't see why steem would face any of those issues (not being listed), unless there is a lack of volume perhaps? The fact that steem didn't do an ICO is a big plus in its favor with how regulars will look at it.