• The number disappears and reappears when voting. This is a bad feel. Can you make it just change the number instantly, even if there is still potentially some behind-the-scenes server processing going on? Also, the vote button itself just slightly changes the arrow color, it would be easier to see and more satisfying if it create a colored-in box around the arrow.
• Posts with hundreds of comments fail to load the comments. For example, see https://lemmy.world/post/373743. The comments won’t load on that post. Also, when you click into a post, please load the comments instead of making the user have to hit the comments button to load them. I consider a post to be as much about the comments as the post. Many times, I read the comments first.
• The post cards have rounded edges and gaps between each post, which is a bit distracting. It would be better on my eyes if the user can turn off the rounded card theme and have that screen real-estate used to show more of the post and pictures. All in need to know when the next post has started is a very thin line.
• Sometimes, the subscribe button doesn’t work.
• Sometimes, the All feed for an account won’t load and I have to first click on the server itself instead of the All option in order to fix this.
• Even though the project is young, opening up the Repo and Issue/Enhancement trackers is ideal. This will have the residual benefit of having others contribute potential code suggestions / merge requests in order to make the app get to a production-ready state faster.

Keep up the good work!