I genuinely do not think how "doing the amnesia better than Dandadan" can be a selling point. It's not wrong, but it's like saying a fish swims better than a cow with stage 4 cancer.
So far in Dandadan amensia is being used for stalling the progression.
The fact that Re: Zero has handled amnesia plots better than Dandadan is interesting. But I'm not complaining, it is REALLY good.