First, congratulations for the new visual, looks great.
Now let's talk about bugs.
My phone is a Samsung Galaxy S3 mini.
The first one it's a nasty one. When i have a short list of messages, less then 5 on my phone for example, when i scroll the list, the bottom light came up as i scroll and should be be or stay at the bottom of the screen. This a bug you have for a long time.
Do not put the same information in various places. I'm talking about "That's new". Just keep that in "About" on definitions, do not put a shortcut.
You have some bugs with colours and icons when you change night theme option, but i think you will fix that with time. In my opinion you should stick with only two themes, less bugs to correct.
If you change application style to the new layout, please change the application icon too.
Thanks for remove gifs tab and if you want to be a top app you should remove emotions gifs. Just stay with emojis. And adjust the attachment icons.
Other then that, GREAT JOB! Keep it simple.
I'm a electronic engineer doing research and development and i like your app.