I agree for the unit bias, problem is and was exchanges never started selling sats per dollar, and some like Binance even prefer to sell a scam shitcoin caalled SATS and benefit from it than helping bitcoin adoption.
For the use of existing Unicode, I see other problems that could emerge. For example imagine if (When) in the future (more close than we think) raise appreciation comes to level where you need to use and display millisats, how you will then call them? again bitcoins and shifting zero and commas?