Version 0.14 gets a lower rating from me than 0.13 because it uses ImageMagick to convert a vector-based image to a rasterised image to put into the pdf rather than retaining the vector format. Version 0.13 produces better looking pdf files. I looked through the options for ImageMagick but didn't find anything to keep vector information. I'm curious why ImageMagick was chosen.
I still prefer gnuplot over Chart::Clicker and SVG::TT::Graph::TimeSeries for graphing time series data. I've used gnuplot directly in the past and didn't have much trouble adapting to this module's interface.
My one issue was that it isn't possible to use the interactive x11 terminal (it displays the image for a fraction of a second and then it immediately disappears). I was able to get it working by including the code below in my script.