I think Luddite could be easily used as an adjective, in for example, a Luddite mindset, which is what you could call the mindset of a Luddite. In fact doesn't the 'ite' ending indicate that it was probably originally an adjective that has been nouned? Who or what was a 'Ludd' anyway?

As for a word for Luddite that doesn't have the same level of pejorativeness (pejorativity?) I guess technophobe (-ic) would still be slightly negative, as would reactionary. If you're accepting neologisms, how about neo-wary? Or perhaps you could find a word that emphasizes the positive aspect of wanting to hang on to what is good from the past, rather than being afraid of the future? Like a nostalgiaphile, or whatever the real word for that would be.