We originally stripped out the extraneous properties from tickets during Cerb4 development, but I have to confess I've been tempted a few times to set a higher priority on a ticket to call attention to it (especially if it had been sitting around for a while). Ideologically I still don't like the idea of having to juggle a bunch of properties per ticket, but this is probably something we can add back to the roadmap and think about setting in the 'Next Step' block on reply.
Custom fields can handle the 'priorities' part, but we'd need renderer plugins for views to handle row colorization.
http://www.cerb4.com/forums/showpost.php?p=14868&postcount=12
"I would add a Priority column where Mask, Subject and Updated columns are with a color coded system. However, this wasn't in 2.7 so I recognize it's quite unlikely it'll get added."