I think it's not so much that Trinity doesn't like KOffice, and more-so that they have to make some tough decisions regarding what projects to spend their limited development resources on. I'm sure they'd be happy for people to adopt other KDE apps. :-) If you can maintain (or pay someone to maintain) KOffice, I'm sure they'll be happy to get help, and that they'll be able to "save" another KDE app. As it is, they need to focus on the projects they think will be the most useful to people in general/themselves in particular. Personally, I'd rather the core and konqueror, etc are stable, efficient, and converted to Qt4 sooner, rather than having KOffice support, but that's just my opinion. I mean, I'd prefer both, but such is life.
Not Affiliated With Trinity Desktop Project