I block Lemmy.ml, so I wouldn't create an account on there anyhow. While I think most new users would be better suited on an instance that defederates from Lemmygrad and Hexbear, the substantial userbase of lemmy.ml makes it better to block it instead so that its users can still interact in non-.ml communities and avoid splintering the Threadiverse needlessly.

In any case, what's most important is not focusing on what makes Lemmy, Piefed, and Mbin better or worse than each other, but how to make them all collectively better and make every effort to recruit as many new users from Reddit as possible. Most Redditors won't join, but even 0.01% of them doing so (44,380 users) would double the size of the Threadiverse.