I watch over Trinity project for as long as 3 years. I
want to give my
grade on its development activity. I think that the project is not
capable of public use and rather suited for small group of inside
hackers.
Along the history of development there were too much lame
unprofessional decisions. It was fulfilling some strange unpractical
ideas. In fact, it came to a logical unsuccessful end.
While in hindsight some of the project's goals were a bit too ambitious,
this has been true at some point for many open-source projects over the
years. A better measure of success is whether or not the project is still
alive and moving forward, along with an active and engaged userbase. At
this time I think we can answer both questions with "Yes!".
If you install 3.5.13 you will get too much trouble. I
think, that
implementing all the missing features into KDE4 is less cost, than
waiting when this woe project will get to a decent condition.
I encourage you to hack on the KDE SC 5 sources to fix the issues you have
experienced, and then work on getting the resultant patches into KDE SC 5
so that all may benefit from them. AFAIK the KDE 4 series has
transitioned into maintenance mode at this time, so it is highly unlikely
that you will get anything UI-changing accepted into the KDE 4 series
branches.
Just my $0.02. :-)
Tim