Hi Pavroo,
thanks for the announcement of its inclusion in Sparky. On reading
https://en.wikipedia.org/wiki/OnlyOffice though, i think i'm not installing it.
Apparently, it's a Client-Server-System with the Office programs implemented as HTML5 Web apps, connecting to a (optionally local) Server hosting the actual code in .NET(Windows) or Mono(Linux).
Maybe i'm old-fashioned, but i'd rather stay with good ol'e Libre Office.
p.s. if this is the wrong forum (not pre-installed) i'll gladly delete & re-post.