Hello,
This post gives a summary of the issues people have with overcentralization of users and communities on LW: https://lemmy.world/post/14728407
This is a meme but with some technical explanations why instances like aussie.zone have a 7-days delay with LW, but are up-to-date with all the other instances: https://lemmy.world/post/20575394
You are able to export your subscriptions and block lists to a new account using your settings (there is an export/import function). You cannot import your posts and comments, but if you use the same username and add your old account in your bio you can still show your past posts that way.
How are political communities tiny when they are 2 of the 6 most active communities on Lemmy?
To be honest, the issue is mostly about !politics@lemmy.world banning self posts (and thus people having to find alternatives such as !politicaldiscussion@lemmy.world ) rather than the mods of !asklemmy@lemmy.world