For slide-formatted pdf to ppt, I use a number of tools with varying results. Because the results are dependent on content -- as well as the initial setup of the ppt environment (backgrounds, etc.) -- I suggest you experiments with some of the free tools before moving on to the more costly solutions. For other than extracted slides ... I have not found an acceptable tool to automate the conversion of pdf files into PowerPoint. But I do use Ppt To Pdf Converter Professional to export graphics to individual files and to recognize text using OCR. Then I cut-and-paste the wanted copies into my PPT format. I do my footnotes as the last slide -- then I can use hand-outs, projected talk slides, or make the entire package available on the web.
The best tool I've found that will help for a presentation style is the Adobe After Effects program. I use After Effects for editing the PowerPoint, PDF export, and some related video work. Adobe is free, it's a great program, and it's highly adjustable. Once I've made a presentation for a seminar in the classroom or at the office, I import the slides into the program and import audio files into the timeline. And then finally, I export the final output (a .PPTX) to a file such as PDF. If I'm not satisfied with the results of the above programs, I can use the free software I mention below to convert the presentation into a PDF file. For example, I will use the free software Handbrake to edit and convert the video of the presentation. This program does not change any formatting of the presentation. However, the program does.