No, vulture swarms won't be the new meta. They will be good with those excellent energy shells. Most people won't want to drop another $80 or whatever it costs for a hyperspace legal list these days. (I like vulture droids, but I already have other ships) They used all their money rebuying a-wings at $20 a pop.
Also, most people don't know how to effectively fly more than 3 ships. Current best results are obtained with 4-5 ship lists, yet they have not overtaken the meta.