The issue I have is that CC15 simply isn't doing true realtime previews. The info panel assures me it is running at 25fps but the preview is clearly stuttering. It's subtle and I'm sure 70% of punters wouldn't notice but its driving me nuts. Exact same project in CC14 previews smoothly.
I'd just stay with CC14 but the El Cap upgrade seems to have broken CC14s UI when using dual monitors (great)
I'm on an old 2010 MacPro, GTX680, fast raids, 32GB ... I appreciate the move forwards separating the UI from the renderer in CC15 but realtime previews are essential !
just upgraded to cc2015.3 to see if it was time to move on from 2014 but no, 2015.3 still has the same issues. info panel assures me it's playing at 24fps, but playback is clearly jerky and stuttering... ah well.
on a side note camera tracking is also still failing on 4K footage with 2015.3 upgrade, same comps track fine in 2014... ah well.
Would I be correct in guessing that both of you are working on 4K or 5K screens? If so, try shrinking the vertical size of your timeline panel. Does that help?