I honestly miss people building random stuff on the internet to showcase unique information on things like Geocities. They were almost always "ugly" but also always visually entertaining. I remember skimming through hundreds of car Geocities sites by enthusiasts who had no clue how to build a website but wanted to show off their rides. It was always a rollercoaster of poor UX and bad quality images but something was…
Well it's dangerous to give people the tools to design themselves - it's a rare skill and very difficult to blend it all together into a cohesive community! I think many startups of the 2010s saw Myspace design as a disaster. We're hoping that by having some default color palettes and some common patterns and fonts - as well as limits to paddings, margins and border sizes - that it helps people stay in the ballpark o…
Having built a site builder before, I think you are on the right track. I think you're right to limit the design scope people have access to in order to manage Multiverses' brand image, I wouldn't recommend otherwise. What you've got is much more platform than blog/site builder, the network effect is going to rely on people wanting a "Multiverse" site and that's going to be a particular aesthetic.
In general though, there is a saying in music when someone makes a mistake: "It's only music, nobody died". I think the same could be applied to the web in general, and personal sites especially. Things got reaaaally boring after the "Flat design" trend of the 2010s powerwashed the web of anything remotely interesting, and as much as it brought in good UX and design patterns it also stripped out a lot of character. It'll be nice to see people try on their design pants again.