Hello there!
First of all, I really like Zettlr! However, what is very important for me is data security and privacy.
When I first started Zettlr and looked through the options, I stumbled upon the Language Tool which is activated by default. I then learned that, with this tool beeing activated, my texts are send to a server for spell checking, which surprised me in a bad way, to be honest (because Zettlr is emphasizing data privacy on its website).
So my suggestion would be to turn off this service by default, so that new users have to actively think about using it (switching it on by themselves) or not. Of course, there is a good documentation about the Language tool and how to run it offline, but honestly, I think the majority of people just use programs or consult youtube tutorials on how to use these.
So I would like to hear what others think about this, and if I am to picky about this topic?