Just tell me why lemmy.ml should necessarily be ideologically diverse? To be in permanent chaos and useless fights? I think there is already plenty of such platforms…
final thoughts: sleek is an awesome foss to do app based on todo.txt https://github.com/ransome1/sleek
UX / design, it looks very similar to twitter for me, ie you have text field like in twitter where you write your memo and can use tags. So visual similarity mostly