Anyways here are my impressions after 1 month.
1. You have to transfer terminfo to all ssh servers because the kitty term does not exist there.
2. By default mouse selection with double click + drag to select multiple lines is not normal. I believe this could be fixed but I haven't figured out how yet. (I could not re-create this right now, maybe it was fixed in some recent upgrade)
3. Unlike gnome-terminal (my old default) it actually opens up to fullscreen if you used it in fullscreen mode last.
4. Unlike gnome-terminal I could immediately figure out how to make it open up a few default tabs like a session on start up.
5. Its CLI tools don't accept the same arguments when defining a session, as when using them outside of the session definition. This was barely documented.
Overall the impression is good because I'm still using it. I rarely use anything new this long if it has issues affecting my workflow.