Hopefully, we can get some better mod tools into Lemmy soon, which will result in even instances like Beehaw not having to worry about federating with big instances.

I think the main current outcome of decision will be that Lemmy users will be hesitant to start any bigger communities on beehaw.org, but this is probably a positive outcome for Beehaw admins in terms of what their goals are. Users can't create communities on Beehaw anyway, so this point is moot.

As for what this means for lemm.ee: based on their reasoning in the post, I think it's entirely possible that they will keep defederating instances which grow beyond a certain point, and lemm.ee might reach that size soon as well. So I would recommend keeping this in mind while you plan where to house your communities etc - if you're interested in what Beehaw has to offer, then it might be best to preemptively go directly to them, and conversely, if you're more interested in the wider federated network, then building communities on instances such as lemm.ee would be the safer bet.

Edit: I posted a comment asking if beehaw.org might defederate lemm.ee in the future if we grow more, their response for now was that they doubt it.