I'm not commenting on the issue of the late Patriarch's glorification. I don't know enough to have an opinion and it is best left to the Church of Serbia. But this link to an Akathist composed to commemorate him has beautiful examples of Serbian Chant. (SORRY< THE WRONG URL WAS PASTED HERE> THIS IS THE CORRECT ONE: http://www.molitvenik.in.rs/akatisti/akatisti_svetima/akatist_svetom_pavlu_patrijarhu_srbskom.html
The progression from traditional Byzantine Chant through the lands of the South Slavs into the Eastern Slavs is interesting and one can hear strains of both echoing in this service.
Eternal Memory. Vichnaja Jemu Pamjat, Patriarch Pavle.