It will take a while, but in the long run this is likely to improve the site overall and help sellers to remain paid for work done. For a very long time sellers felt pressured to maintain 100% perfect ratings which just isn’t good. No one can please every single person at all times. When you look at movie reviews, books reviews, Yelp reviews you will likely consider anything from 4-5 stars to be excellent. If 5 people hated their haircut but 300 loved theirs, a barbershop would still have a good rating and plenty of customers would go. This expectation of perfection and 100% reviews needs to stop.
What will happen in time is that sellers here are going to get a few lower reviews. Many will get at least 1 or 2 late cancels and 1 star reviews too, since everyone occasionally has a complete emergency and cannot get to a computer. Once this becomes normal and the average excellent seller has an overall 4-5 star rating, the site will be better. The sellers who are now providing terrible 2 start work will get 2 star ratings and have to make changes or leave. In the past, way too many sellers did bad work and pleaded with buyers to accept bribes and refunds in turn for 4-5 star reviews or no reviews, so those bad sellers are still here bringing the whole thing down for everyone.
If your service is good, don’t worry. You’ll be able to maintain over 4 stars and CS will still work with you on cases where a buyer is completely wrong. In the meantime, you will get to keep your money for work done and the buyer can leave their honest opinion. It feels very scary now, but it will be a relief in the future to know you don’t have to sacrifice your money to keep a perfect rating. We aren’t perfect people. End of 100% reviews can also mean end of 100% high pressure stress.