Probably a very polarizing question.
On the one hand, having most of the users and communities on LW causes technical issues (see this post), and also gives the LW staff too much power over Lemmy as a whole.
On the other hand, with 18k MAU on LW out of 47k (https://fedidb.org/software/lemmy/), every community listed there has a much higher chance of visibility compared to an alternative hosted on another instance
Hot take: No.
Lemmy.world being the “main” instance is natural, and Lemmy makes it difficult to discover new communities so it’s also natural that lots of discussion would be in lemmy.world, too.
There was also still an unresolved issue where some instances can disappear and take out all their communities. Remember lemmy.film? I believe the Lemmy devs once said they want to make a system to migrate communities in case something like this happens but nobody knows when it’ll get added.
I think it’s a platform problem, I understand that connecting to all sorts of instances is the point of the fediverse but until it becomes more intuitive and less dangerous, I’m going to just stick with the most popular communities. Attempting to move people out of lemmy.world and into other duplicate communities will only split people more.