There are more examples, of course, just the ones I remember of the top of my head
The problem is that melee builds put out more damage by hitting with AA + WPS (or just AA, like DK Krieg Cadence where you don’t want to miss Cadence charging). Casters that have this in rotation are generally less pleasant to play since you have to be in a melee range for a very weak nuke and you already have a heavy rotation on Vitality casters that you really don’t want to miss as well.
I mean lackluster nature of Uro’s relic skill has been known for a long time now, it’s nothing new. And since Impurity has been buffed to a very decent state Uro has become even more irrelevant.
But again, I am talking about high end endgame min-maxed stuff. From the point of view of casual gamer that reaches endgame and dabbles a bit in SR 50 ish and maybe has like two lvl 100 geared characters the only problem I see is that skill is on the most expensive Necro’s relic. I would move it to some low tier level 40-50 relic and put a nuke on Uro worth ~500% weapon damage with like 360 degrees ~10 metres aoe kind of like Acid Abomination.