If you use Windows, yeah, LibreOffice doesn’t look all that nice. Setting it to “tabbed” view mode makes it a bit better (try that first) Image

but the icons are still pretty small with little padding (on Windows at least. On Linux it is perfectly fine, so I use LibreOffice!). OnlyOffice will be more padded and has bigger icons than LibreOffice in Windows, yeah. I think it would work.