People have been trained that they have to rewrite PLR articles
in order to benefit from them, but it's just not true.
The good news is that Google doesn't penalize sites for 'duplicate content'. That myth gets perpetuated because way back in the early days of the internet, people were setting up spam sites with pages full of keywords instead of content and Google 'slapped' them -- but you won't be doing that with your PLR articles, right?
So try a few of these ideas...