With Forms Central retiring, we are still in search of an economical yet viable solution. Can our existing Forms Central forms be converted to Adobe DC fillable-pdfs easily?
Yes. All existing FormsCentral pdf forms can be filled out in Adobe Acrobat/Reader DC. What is going away is the ability for the Submit button to send the filler's responses to the FormsCentral server (which is going away). If you have Adobe Acrobat DC, you can edit the pdf files to remove the Submit button (Tools->Forms->Edit Form). You can also remove the button using older versions of Acrobat Pro (X, XI) to do the same thing and the resulting pdf forms will also work in Adobe Acrobat/Reader DC.