We just added Alexandrite to the server, it's an alternative desktop UI for Lemmy created by Sheodox who worked tirelessly to make the necessary changes to we could host it ourselves here. So go to https://a.lemmy.world and have a look!
He continues to update it constantly, you can follow the development on his github page or in his community. If you like what you see and want to support him, why not buy him a coffee? :)
For those who don't have Lemmy World as their home instance and want to use Alexandrite, either ask your instance admins to add it or go to https://alexandrite.app!
Edit: I should probably have mentioned that Alexandrite is meant for desktop!
I'm pretty happy with Voyager on mobile, but when writing something, it's not ideal.
The generic Lemmy UI is more than OK on desktop, but the lack of error code reporting to the user was frustrating, at times I tried to resubmit posts and comments and the spinning Submit button just kept on going, for some communities in particular. So I stopped posting in these communities.
Now, with Alexandrite, I feel like this is a good UI that I really like. And I love that you write out the background error message for why posting or commenting fails!
Lack of error codes is something I see often even in professional website development. Even Windows has run into that issue now; Click button. Button loads. Button stops - no action. Or, the application just closes.
I think with the separation of product design and engineers in modern teams, it ends up being really hard for everyone to settle on a good path for errors on every single little thing - and including that in the design can make you "feel" your product is error prone, even if 99% of people never see any of those.