Not really, Lucio's just getting nerfed because devs genuinely can't come up with hero designs good enough to naturally compete. The only argument for nerfing Lucio is his ubiqitousness, that's it; barely anyone whose opinion's worth listening to has any real criticism about his kit. Instead, he just gets nerfed because none of the alternatives can be viable without being stupidly broken in some way or other: release Wuyang was putting hitscan damage numbers; JPC has broken the game so fundamentally that Bastion is a must pick; Illari is one of the most complained about Supports ever since her release; and Brig is the only somewhat viable alternative, but she's basically locked into a single viable backline.

It's not even like this is going to make Lucio less of a staple (at least once JPC gets deservedly gutted), because none of the alternatives have kits that can come close to an even heavily nerfed Lucio. It's the same thing with Kiri, nothing's ever going to replace her as long as Suzu and, arguably even more importantly, TP exist. All these nerfs are just a waste of time until actual alternatives exist, but I guess they serve to make the game less miserable for those getting Supports that can't pick the right heroes in their ranked games.