Agree with the above posts.
The new big releases do tend to have bugs so a little restraint is required. DEFINITELY finish current projects.
I have completed a couple of small projects in Premiere 2015 without too much hassle but the biggest annoyance as the dynamic link between AE and PP. If you import an AE comp, sometimes it doesn’t appear in the list of comps in a project in the import dialogue, so I had to export from AE and import the rendered mov or mp4, rather than “render and replace” on the timeline.
I think a few times the “replace with after effects comp” command created the comp in AE but in Premiere there was an error and I was left with the original clip so, again, I had to render from AE and import in PP.
A few other bugs were present but I can’t remember the specifics. They were fairly small projects so I didn’t get to give it a full Audio Editing workout etc. My current projects, I still have in 2014. I am excited to try out the new features like the morph transition in the future though as I edit a lot of talking heads!
AE comps seemed to play better directly on the PP timeline though (when I was able to import them or “replace with…”).