While I appreciate effort put into making the interface prettier, one of the things that really detracts from LibreOffice and why I almost invariably end up installing MS Word for clients is the confusing way which the mail merge system is designed in LibreOffice. I've done it enough times now to know mostly how to get it working for myself, but there's no way in hell I'll try teaching a client how to do a mail merge in LibreOffice.

And even myself, I've had to completely scrap documents I'm working on because LibreOffice gets confused and does what I'm assuming is some kind of join, resulting in tons of duplicates when it comes time to print[1]. It's almost certainly user error, but where to fix it is unclear. That whole mechanism needs to be gutted and reworked.

But I continue to deal with it because Linux is my primary environment and it's good enough in everything else I have to deal with.

[1] something like multiple data sources used accidentally, even though both point at the same source file, and even after wiping all data sources, the issue remains.