I also really like zeraora as a pivot that isn't afraid of zapdos, which is one of the best defensive mons in the meta right now. It's very solid on offense and on balance, and can even work on electric spam with koko powering up its already strong plasma fistsView attachment 306074 C+ -> B-.
The pivot set from last DLC with boots, knock off and volt switch is still really good. While Dragapult is no longer as relevant, Zeraora has new targets like Spectier, Fini, Tornadus-T, and Cinderace. Aside from Regieleki, this thing still outspeeds the whole unboosted tier! Most notably, revenge killing Spectier is a godsend for so many teams.
Offensive teams are often hard pressed to switch into Zeraora. It can knock off its counters, like Landorus-T, while not being worn down itself thanks to boots. Getting chip on the opposing team is made even easier because Zeraora naturally threatens many defoggers, like flying types and hydreigon. The exception is Landorus-T, which again, is susceptible to knock off.
Even against bulky teams, Zeraora harasses them with knock off and volt switch while not allowing defog.
Once the opposing team is weakened, they are often completely unable to beat this thing. It hits a lot of Pokemon super effectively, threatening OHKOs in the late game, and has few type weaknesses, making it hard to beat with the "survive one hit and KO back" strategy.
The grass types that were expected to ruin Zeraora this DLC -- Bulu, Amoonguss, and Tangrowth -- are not very common or good except Tangrowth which is still not a staple by any means. Kartana, which is the highest ranked new grass type, is simply a victim.
tl;dr people wrote Zeraora off after the latest DLC, and while it's worse than before, it's still very good with an amazing speed tier, good coverage, and utility moves.
Side note: I occasionally still see offensive Regieleki -- use Zeraora instead!