A big big problem is accessibility. The new themes are all worse for the eyes than the previous ones and there's been complaints of vision issues. My fiancé had to install a third party discord client because the actual discord one makes their head spin on every theme.

Also on a more personal note, I really hate that the dms are separated from the servers. My favorite aspect of discord is that knowledge transfers between platforms. It feels like I'm using discord and not discord mobile and then also discord desktop. Now it's all fucky and it took me like 5 minutes to figure out how to even see who was in the server (it's in the top left, the area furthest from the average person's reach).

It's also apparently really buggy and noticeably slower. Earlier I sent a pic into a server and it just silently sent to my most recent DM instead. After a search I found I'm not the only one that had.this happen either.