The linked post essentially performed a benchmark of lemmy apps and if they properly display the formating options available. Sync got 3rd last place, position 18 out of 20 apps, with a score of 6.9 out of 10. There's a comment that essentially contains the test set. I hope we get some fixes, cause some of the problems have been around for a while.
In my personal experience the issues with spoiler tags, and some of the embedded images and their sizes is rather annoying. For example this comment shows perfectly fine on desktop, but becomes a garbled mess on sync (as you can tell by my comment, blaming the bot). Also note that while sync technically gets 3/3 for the images, the last image should be text-sized between the "arrows". It isn't, it's just huge (and consequently a pixelated mess).
Edit: fixed link to example comment for spoiler.
The red light on a camera also means it's "recording". Which is the reason the record-action in audio/video software is still a red circle to this day. This being about audio and video recording capability makes this another way to look at it, in a not complicated way.
What in trying to say is that what's intuitive depends on your perspective. Most of all what you've encountered before that's similar. It had nothing to do with overcomplicating anything.