Ever since I upgraded to el capitan I've had nothing but issues.
First was the microsoft office mess, multiple productivity I use are now filled with bugs and problems, and not mention runs slower overall then ever.
I've had nightmare with the original hard drive which probably wasn't related but I ended up losing data and buying a new one.
Since the new drive I've had iTunes completely destroy my library and the partition I boot off of has twice become unreadable or corrupt so thank goodness for time machine restores.
So to my question, I'm inexperienced with Time Machine, is it possible to restore to a prior backup of Yosemite but still keep files and documents from after intact? Or is the safest bet to separately backup data from after then migrate it in.