After the change, Lurrus got unbanned in Vintage in February 2021 and is still seeing play today
You did choose to run the deck, after all
There are plenty of ways to slip Lightning through enemy lines, like Rogue's Passage and Whispersilk Cloak, so you can reliably paint a target on the back of the tables biggest threat
Flash makes it versatile against all sorts of stuff, including notorious card drawing permanents, planeswalkers, cascade, etc
1-cost Jewelry Bonney can be played in the Green Bonney deck, so shes a good one to get your hands on
However, there are better cards for similar mana costs that offer more impactful effects or immediate value, such as Thalia, Guardian of Thraben or Knight of the Reliquary