I really don't think that a 9% tax will get the UAE out from the blacklist, at least not from UE countries. You would need at least 15 or 20 and for sure Freezones too. I think this is a move to get more money from people who are exploiting the system, and get more money from companies which are to radicated in the UAE to move. It's like Netflix raising prices or Google Maps API asking for money after years of giving away the service for free, you start low and then start raising prices when people are used to the ecosystem.
Also this is to counteract the fact that you could abuse freelance permits or remote working visas with LLCs, where you could have a cheap LLC, a remote working visa, and clean a lot of money with 600$ a year, so I guess that, like
@Fred said in another topic, they will start to be picky about who gets a tax certificate: I would say that up to 200k with a remote work visa and LLC would be ok, but above that they want your money and you have to open a freezone company. Which is ok if you are making 200k or more of profit, you can take the hit. Remember that the UAE is not a democratic country, they issuing of a tax certificate is discretionary, so playing by the unwritten rules is mandatory.
In any case what makes the UAE broken, in a digital nomad / ecommerce world, is the enter once every 180 days and still be resident with no CRS rule, in a country which is a 5h direct flight from most UE capitals.