This update not only gives the buyers the opportunity to damage your gigs/profile at zero cost but here is more:
Let's say your competitor has 10 friends, or fake accounts with different credit cards.
They can order your gig 10 times and then cancel them refunding their funds and leaving you 1 star reviews at no cost.
Such action will completely demolish you from the platform.
In modern world even 1 person can have about 5 credit cards from different banks and creating accounts are 5 min task.
I personally have had a client who asking for a service. He started asking for a discount lowering the gig price( $100 > $90 > $80 > $70 > 60 and so on)
I have refused working with him at all. I have blocked him. Let's say his username was davidbrown
Then he created a new account davidbrown2, asking for my service. I recognized this and blocked him twice.
Then he created about 5 new accounts (i.e davidbrown321, davidbrown63441) in an hour trying ordering my gigs.
I have blocked all his accounts and cancelled the orders. So in total I have received a heart attack, zero money, lost my time, received 3 order cancellations. With the new update I would have 3 1-star reviews in an hour.
It is a fact and after this update sellers won't have any protection at all. All reputation can be lost in a few clicks and for zero cost.