My company has been using CC and CC2014 for a while now on mountain lion. Everything is working quite well. I had one issue with a particular machine that would render one frame from a comp (After Effects CC and CC2014) and then freeze up until you force quit. All other machines would render from the same project with no problems.
I just upgraded all machines to Mavericks and everything seems to be working better. That same project renders with no problems.